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  • Articles  (1,181)
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  • 1
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    Studia logica 41 (1982), S. 197-226 
    ISSN: 1572-8730
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    Topics: Mathematics , Philosophy
    Notes: Abstract In the first part of this paper a logic is defined for propositions whose probability of being true may not be known. A speaker's beliefs about which propositions are true are still interesting in this case. The meaning of propositions is determined by the consequences of asserting them: in this logic there are debates which incur certain costs for the protagonists. The second part of the paper describes the mathematics of the resulting logic which displays several novel features.
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  • 2
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    Studia logica 41 (1982), S. 227-248 
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    Topics: Mathematics , Philosophy
    Notes: Abstract The aim of this paper is to offer a rigorous explication of statements ascribing ability to agents and to develop the logic of such statements. A world is said to be feasible iff it is compatible with the actual past-and-present. W is a P-world iff W is feasible and P is true in W (where P is a proposition). P is a sufficient condition for Q iff every P world is a Q world. P is a necessary condition for Q iff Q is a sufficient condition forP. Each individual property S is shown to generate a rule for an agent X. X heeds S iff X makes all his future choices in accordance with S. (Note that X may heed S and yet fail to have it). S is a P-strategy for X iff X's heeding S together with P is a necessary and sufficient condition for X to have S. (P-strategies are thus rules which X is able to implement on the proviso P).Provisional opportunity: X has the opportunity to A provided P iff there is an S such that S is a P-strategy for X and X's implementing S is a sufficient condition for X's doing A. P is etiologically complete iff for every event E which P reports P also reports an etiological ancestry of E, and P is true. Categorical opportunity: X has the opportunity to A iff there is a P such that P is etiologically complete and X has the opportunity to A provided P. For X to have the ability to A there must not only be an appropriate strategy, but X must have a command of that strategy. X steadfastly intends A iff X intends A at every future moment at which his doing A is not yet inevitable. X has a command of S w.r.t. A and P iff X's steadfastly intending A together with P is a sufficient condition for X to implement S. Provisional ability: X can A provided P iff there is an S such that S is a P-strategy for X, X's implementing S is a sufficient condition for X's doing A, and X has a command of S w.r.t. A and P. Categorical ability: X can A iff there is a P such that P is etiologically complete and X can A provided P. X is free w.r.t. to A iff X can A and X can non- A. X is free iff there is an A such that X is free w.r.t. A.
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    Studia logica 41 (1982), S. 381-413 
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    Topics: Mathematics , Philosophy
    Notes: Abstract A generalized Wittgensteinian semantics for propositional languages is presented, based on a lattice of elementary situations. Of these, maximal ones are possible worlds, constituting a logical space; minimal ones are logical atoms, partitioned into its dimensions. A verifier of a proposition α is an elementary situation such that if real it makes α true. The reference (or objective) of a proposition is a situation, which is the set of all its minimal verifiers. (Maximal ones constitute its locus.) Situations are shown to form a Boolean algebra, and the Boolean set algebra of loci is its representation. Wittgenstein's is a special case, admitting binary dimensions only.
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    Studia logica 51 (1992), S. 1-20 
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    Topics: Mathematics , Philosophy
    Notes: Abstract Models are constructed for a variety of systems of quantified relevance logic with identity. Models are given for systems with different principles governing the transitivity of identity and substitution, and the relative merits of these principles are discussed. The models in this paper are all extensions of the semantics of Fine's “Semantics for Quantified Relevance Logic” (Journal of Philosophical Logic 17 (1988)).
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    Studia logica 51 (1992), S. 21-47 
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    Topics: Mathematics , Philosophy
    Notes: Abstract We introduce two new belief revision axioms: partial monotonicity and consequence correctness. We show that partial monotonicity is consistent with but independent of the full set of axioms for a Gärdenfors belief revision sytem. In contrast to the Gärdenfors inconsistency results for certain monotonicity principles, we use partial monotonicity to inform a consistent formalization of the Ramsey test within a belief revision system extended by a conditional operator. We take this to be a technical dissolution of the well-known Gärdenfors dilemma. In addition, we present the consequential correctness axiom as a new measure of minimal revision in terms of the deductive core of a proposition whose support we wish to excise. We survey several syntactic and semantic belief revision systems and evaluate them according to both the Gärdenfors axioms and our new axioms. Furthermore, our algebraic characterization of semantic revision systems provides a useful technical device for analysis and comparison, which we illustrate with several new proofs. Finally, we have a new inconsistency result, which is dual to the Gärdenfors inconsistency results. Any elementary belief revision system that is consequentially correct must violate the Gärdenfors axiom of strong boundedness (K*8), which we characterize as yet another monotonicity condition.
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    Studia logica 51 (1992), S. 125-143 
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    Topics: Mathematics , Philosophy
    Notes: Abstract This paper deals with some strengthenings of the non-directional product-free Lambek calculus by means of additional structural rules. In fact, the rules contraction and expansion are restricted to basic types. For each of the presented systems the usual proof-theoretic notions are discussed, some new concepts especially designed for these calculi are introduced reflecting their intermediate position between the weaker and the stronger sequent-systems.
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    Studia logica 51 (1992), S. 195-214 
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    Topics: Mathematics , Philosophy
    Notes: Abstract The quantified extension of a canonical prepositional intermediate logic is complete with respect to the generalization of Kripke semantics taking into consideration set-valued functors defined on a category.
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    Studia logica 51 (1992), S. 279-316 
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    Topics: Mathematics , Philosophy
    Notes: Abstract The properties of belief revision operators are known to have an informal semantics which relates them to the axioms of conditional logic. The purpose of this paper is to make this connection precise via the model theory of conditional logic. A semantics for conditional logic is presented, which is expressed in terms of algebraic models constructed ultimately out of revision operators. In addition, it is shown that each algebraic model determines both a revision operator and a logic, that are related by virtue of the stable Ramsey test.
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    Studia logica 51 (1992), S. 533-550 
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    Notes: Abstract The author has previously introduced an operatorδ into dynamic logic which takes formulae to terms; the suggested reading ofδ A was “the bringing about of A” or “the seeing to it that A”. After criticism from S. K. Thomason and T. J. Surendonk the author now presents an improved version of his theory. The crucial feature is the introduction of an operatorOK taking terms to formulae; the suggested reading of OKα is “α always terminates”.
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    Studia logica 51 (1992), S. 519-532 
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    Notes: Abstract The basic bimodal systemK/K can be interpreted as an analysis of the logic of ability developed in [1]. Where in [1] we would express the claimI can bring it about that P using the formula , with its non-normal operator , we will now use the formula . Here is a normal alethic possibilitation operator. is a normal necessitation operator, but it is independent of , and not subject to an alethic interpretation. Rather, is interpreted to meanI bring it about that P. The result is a simplification and clarification of a combined logic of ability and action like that in [2], but employing only normal operators. A number of extensions of the basic systemK/K are constructed, first by strengthening the two normal sublogics independently and then by linking the two sublogics via axiom schemata involving both operators. The result is a series of increasingly strong systems which more and more adequately fulfill our expectations for a satisfactory logic of action and ability.
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    Studia logica 51 (1992), S. 579-589 
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    Studia logica 41 (1982), S. 41-65 
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    Notes: Abstract One way to obtain a comprehensive semantics for various systems of modal logic is to use a general notion of non-normal world. In the present article, a general notion of modal system is considered together with a semantic framework provided by such a general notion of non-normal world. Methodologically, the main purpose of this paper is to provide a logical framework for the study of various modalities, notably prepositional attitudes. Some specific systems are studied together with semantics using non-normal worlds of different kinds.
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    Studia logica 41 (1982), S. 83-90 
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    Studia logica 41 (1982), S. 141-158 
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    Topics: Mathematics , Philosophy
    Notes: Abstract Hoare's Iteration Rule is a principle of reasoning that is used to derive correctness assertions about the effects of implementing a while-command. We show that the propositional modal logic of this type of command is axiomatised by Hoare's rule in conjunction with two additional axioms. The proof also establishes decidability of the logic. The paper concludes with a discussion of the relationship between the logic of “while” and Segerberg's axiomatisation of propositional dynamic logic.
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    Studia logica 41 (1982), S. 181-195 
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    Topics: Mathematics , Philosophy
    Notes: Abstract The propositional fragment L 1 of Leśniewski's ontology is the smallest class (of formulas) containing besides all the instances of tautology the formulas of the forms: ɛ(a, b) ⊃ ɛ(a, a), ɛ(a, b) ∧ ɛ(b,).⊃ ɛ(a, c) and ɛ(a, b) ∧ ɛ(b, c). ⊃ ɛ(b, a) being closed under detachment. The purpose of this paper is to furnish another more constructive proof than that given earlier by one of us for: Theorem A is provable in L 1 iff TA is a thesis of first-order predicate logic with equality, where T is a translation of the formulas of L 1 into those of first-order predicate logic with equality such that Tɛ(a, b) = FblxFax (Russeltian-type definite description), TA ∨ B = TA ∨ TB, T ∼ A = ∼TA, etc. For the proof of this theorem use is made of a tableau method based upon the following reduction rules: $$\begin{gathered} \frac{{G\left[ {A \vee B} \right]}}{{G\left[ {A \vee B{\text{\_}}} \right] \vee \sim A|G|[A \vee B\_] \vee \sim B,}}{\text{ }}\frac{{G[\varepsilon (a,b)\_]}}{{G[\varepsilon (a,b)\_] \vee \sim \varepsilon (a,a),}} \hfill \\ \frac{{G[\varepsilon (a,b)\_,\varepsilon (b,c)\_]}}{{G[\varepsilon (a,b)\_,\varepsilon (b,c)\_], \vee \sim \varepsilon (a,c),}}{\text{ }}\frac{{G[\varepsilon (a,b)\_,\varepsilon (b,c)\_]}}{{G[\varepsilon (a,b)\_,\varepsilon (b,c)\_] \vee \sim \varepsilon (b,a),}} \hfill \\ \end{gathered} $$ where F[A +] (G[A−]) means that A occurs in F[A +] (G[A−]) as its positive (negative) part in accordance with the definition given by Schütte.
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    Studia logica 41 (1982), S. 269-282 
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    Topics: Mathematics , Philosophy
    Notes: Abstract The formal language studied in this paper contains two categories of expressions, terms and formulas. Terms express events, formulas propositions. There are infinitely many atomic terms and complex terms are made up by Boolean operations. Where α and β are terms the atomic formulas have the form α=β (α is the same as β), Forb α (α is forbidden) and Perm α (α is permitted). The formulae are truth functional combinations of these. An algebraic and a model theoretic account of validity are given and an axiomatic system is provided for which they are characteristic. The ‘closure principle’, that what is not forbidden is permitted is shown to hold at the level of outcomes but not at the level of events. In the two final sections some other operators are considered and a semantics in terms of action games.
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    Studia logica 41 (1982), S. 297-307 
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    Topics: Mathematics , Philosophy
    Notes: Abstract In this paper I propose a fundamental modification of standard type theory, produce a new kind of type theoretic language, and couch in this language a comprehensive theory of abstract individuals and abstract properties and relations of every type. I then suggest how to employ the theory to solve the four following philosophical problems: (A) the identification and ontological status of Frege's Senses; (B) the deviant behavior of terms in propositional attitude contexts; (C) the non-identity of necessarily equivalent propositions, and (D) the “paradox” of analysis. We can roughly describe these solutions as follows: (A) the senses of English names and descriptions which denote individuals will be modelled as abstract individuals; the senses of English relation denoting expressions of a given type will be modelled as abstract relations of that type. (B) Inside de dicto attitude contexts, these English expressions denote (the abstract objects which serve as) their senses. (C) Relations and propositions will not be identified with their extensions, nor with functions or sets of any kind. They will be taken as primitive, and precise “being” and identity conditions will be proposed consistent with the view that necessarily equivalent relations and propositions may be distinct. (D) With the modelling described in (A), the expressions “being a brother” and “being a male sibling” may both denote the same property, though (the abstract properties which serve as) their senses may differ. Just as Frege predicts, “being a brother just is being a male sibling” is an informative identity statement because the terms flanking the identity sign have the same denotation, though distinct senses.
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    Studia logica 41 (1982), S. 311-316 
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    Notes: Abstract The paper describes in detail the procedure of identification of the inner language and an inner logico of a physical theory. The procedure is a generalization of the original ideas of J. von Neuman and G. Birkhoff about quantum logic.
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    Studia logica 41 (1982), S. 1-2 
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    Studia logica 51 (1992), S. 83-95 
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    Notes: Abstract A principal type-scheme of a λ-term is the most general type-scheme for the term. The converse principal type-scheme theorem (J.R. Hindley, The principal typescheme of an object in combinatory logic, Trans. Amer. Math. Soc. 146 (1969) 29–60) states that every type-scheme of a combinatory term is a principal type-scheme of some combinatory term. This paper shows a simple proof for the theorem in λ-calculus, by constructing an algorithm which transforms a type assignment to a λ-term into a principal type assignment to another λ-term that has the type as its principal type-scheme. The clearness of the algorithm is due to the characterization theorem of principal type-assignment figures. The algorithm is applicable to BCIW-λ-terms as well. Thus a uniform proof is presented for the converse principal type-scheme theorem for general λ-terms and BCIW-λ-terms.
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    Studia logica 51 (1992), S. 113-123 
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    Notes: Abstract This paper is a study of similarities and differences between strong and weak quantum consequence operations determined by a given class of ortholattices. We prove that the only strong orthologics which admits the deduction theorem (the only strong orthologics with algebraic semantics, the only equivalential strong orthologics, respectively) is the classical logic.
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    Studia logica 51 (1992), S. 317-335 
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    Notes: Abstract Dummett's logic LC quantified, Q-LC, is shown to be characterized by the extended frame 〈Q+, ≤,D〉, where Q+ is the set of non-negative rational numbers, ≤is the numerical relation “less or equal then” and D is the domain function such that for all v, w ∈ Q+, Dv ≠ φ and if v ≤ w, then D v . D v $$ \subseteq $$ D w . Moreover, simple completeness proofs of extensions of Q-LC are given.
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    Studia logica 51 (1992), S. 347-378 
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    Notes: Abstract A history of the logic of action is outlined, beginning with St Anselm. Five modern authors are discussed in some detail: von Wright, Fitch, Kanger, Chellas and Pratt.
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    Studia logica 51 (1992), S. 485-517 
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    Notes: Abstract Recent theories of agency (sees to it that) of Nuel Belnap and Michael Perloff are examined, particularly in the context of an early proposal of the author.
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    Studia logica 51 (1992), S. 463-484 
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    Notes: Abstract The conditional,if an agent did something, then the agent could have done otherwise, is analyzed usingstit theory, which is a logic of “seeing to it that” based on agents making choices in the context of branching time. The truth of the conditional is found to be a subtle matter that depends on how it is interpreted (e.g., on what “otherwise” refers to, and on the difference between “could” and “might”) and also on whether or not there are “busy choosers” that can make infinitely many choices in a finite span of time.
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    Studia logica 51 (1992), S. 379-437 
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    Notes: Abstract Whileprocess andaction are fundamental notions, in ubiquitous use, they lack satisfactory logical treatment in two critical respects: in analyses of the fundamentals themselves and in logical development. For what treatment they have so far received, under classical systematisation, leaves significant lacunae and induces much paradox. A relevant logical relocation, carried through in detail here, removes such problems, and provides solid ground-work for a satisfactory treatment. Firstly, as to fundamentals: processes should be explicated, so it is argued, as certain sorts of (time) directed functions (from inputs to outputs); thus they can be represented through certain ordered pairs of relations. Significant logical structures they can enter into are investigated: notably, process lattice and coupled logics, and a generalized category theory (tolerating nonassociativity of composition). Actions are types of processes, agent-ascribed process. As stock analyses of the differentia, operators and agency, through intentionality, rationality and so on, demonstrably fail, new causal analyses are proposed. Secondly, as to logical developments: for the most part, the apparently diverse offering of process and action logics to be encountered in the literature are but multiple modal logics: modal logics enriched with further functors of interesting modal sorts. Some, for example, like advertised “process logics” are dynamic logics (themselves basically multiple modal logics) enriched by tense logical functors, themselves modal in character. In a way that is now becoming nonstandardly standard, these modal enterprises can be reworked on relevant logical bases. A main point to such exercises resembles that of other relevant reworkings: namely, the search for correctness, for adequacy to pre-analytic and linguistic data, and therewith removal of paradoxes and anomalies that accumulate under modal analyses. Logical components from a properly expanded Humean model of action are supplied with relevant logics and semantics, in particulardoing, trying andstriving, intention andmotivation. The difficult question of formalising practical inference is then addressed. Relevant dynamic logics, paralleling modal developments, are built up piece by piece, relevant theory change is considered within a dynamic framework, and work on relevant temporal and process logics of programming cast, including functors such asbefore, during andthroughout, is initiated. The present state of logical play is assessed.
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    Studia logica 41 (1982), S. 3-16 
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    Notes: Abstract Proper n-valued Łukasiewicz algebras are obtained by adding some binary operators, fulfilling some simple equations, to the fundamental operations of n-valued Łukasiewicz algebras. They are the s-algebras corresponding to an axiomatization of Łukasiewicz n-valued propositional calculus that is an extention of the intuitionistic calculus.
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    Studia logica 41 (1982), S. 75-81 
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    Notes: Abstract A signed ∑-equation is an expression of the form t ≈ t′ or t ≉ t′, where t and t′ are ∑-terms (for some ranked set ∑). We characterize those classes of ∑-algebras which are models of a set of signed ∑-equations. Further we consider the problem of finding a complete deductive system analogous to equational logic for the logical consequence operation restricted to signed equations.
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    Studia logica 41 (1982), S. 131-139 
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    Notes: Abstract The paper presents a brief survey of recent work by Metakides, Nerode and others in the area of effective algebra and makes some comments on the relation between formal presentations, characterizations, etc. of sets and of algebraic structures and their practical presentations.
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    Studia logica 41 (1982), S. 17-40 
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    Notes: Abstract In this paper we investigate some basic semantic and syntactic conditions characterizing the equivalence connective. In particular we define three basic classes of algebras: the class of weak equivalential algebras, the class of equivalential algebras and the class of regular equivalential algebras (see [12]). Weak equivalential algebras can be used to study purely equivalential fragments of relevant logics and strict equivalential fragments of some modal logics (for investigations of strict implicational fragments of modal logics see [20]). Equivalential algebras are suitable to study purely equivalential fragment of BCI and BCK logic (see [21], p. 316). A subclass of the class of regular equivalential algebras is suitable to study equivalential fragments of Łukasiewicz logics. Some subvarieties of the class of regular equivalential algebras provide natural semantics for equivalential fragments of the intuitionistic prepositional logic and various intermediate logics (see [13]). The last chapter is a selection of research problems which in the author's opinion are worth to be solved.
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    Studia logica 41 (1982), S. 109-130 
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    Notes: Abstract Urn models were developed by Veikko Rantala to provide a non-standard semantics for first-order logic in which the domains, over which the quantifiers range, are allowed to vary. Rantala uses game-theoretical semantics in his presentation, and the present paper is a study of urn models from a more classical, truth-conditional point of view. An axiomatic system for urn logic is set out and completeness is proved by the method of maximal consistent sets.
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    Studia logica 41 (1982), S. 159-171 
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    Notes: Abstract Intuitionists and classical logicians use in common a large number of the “logical” axioms, even though they supposedly “mean different things” by the logical connectives and quantifiers — conquans for short. But Wittgenstein says “The meaning of a word is its use in the language”. We prove that in a definite sense the intuitionistic axioms do indeed characterize the “logical” conquans, both for the intuitionist and the classical logician.
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    Studia logica 41 (1982), S. 249-268 
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    Notes: Abstract The paper concerns time, change and contradiction, and is in three parts. The first is an analysis of the problem of the instant of change. It is argued that some changes are such that at the instant of change the system is in both the prior and the posterior state. In particular there are some changes from p being true to ℸp being true where a contradiction is realized. The second part of the paper specifies a formal logic which accommodates this possibility. It is a tense logic based on an underlying paraconsistent prepositional logic, the logic of paradox. (See the author's article of the same name Journal of Philosophical Logic 8 (1979).) Soundness and completeness are established, the latter by the canonical model construction, and extensions of the basic system briefly considered. The final part of the paper discusses Leibniz's principle of continuity: “Whatever holds up to the limit holds at the limit”. It argues that in the context of physical changes this is a very plausible principle. When it is built into the logic of the previous part, it allows a rigorous proof that change entails contradictions. Finally the relation of this to remarks on dialectics by Hegel and Engels is briefly discussed.
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    Studia logica 41 (1982), S. 347-349 
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    Notes: Abstract In a recent paper, Montagna proved the undecidability of the first-order theory of diagonalisable algebras. This result is here refined — the set of finitely refutable sentences is shown effectively inseparable from the set of theorems. The proof is quite simple.
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    Studia logica 41 (1982), S. 375-380 
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    Notes: Abstract Proofs of two interpolation theorems for Sentential Calculus with Identity as well as some general comments on sentential interpolation are given.
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    Studia logica 41 (1982), S. 67-73 
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    Notes: Abstract The aim of this note is to show (Theorem 1.6) that in each of the cases: ψ= {→, ∨ }, or {→, ∨, ∧ }, or {→, ∨, ℸ } there are uncountably many ψ-intermediate logics which are not finitely approximable. This result together with the results known in literature allow us to conclude (Theorem 2.2) that for each ψ: either all ψ-intermediate logics are finitely approximate or there are uncountably many of them which lack the property.
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    Studia logica 41 (1982), S. 95-108 
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    Notes: Abstract The standard deduction theorem or introduction rule for implication, for classical logic is also valid for intuitionistic logic, but just as with predicate logic, other rules of inference have to be restricted if the theorem is to hold for weaker implicational logics. In this paper we look in detail at special cases of the Gentzen rule for ⊢ and show that various subsets of these in effect constitute deduction theorems determining all the theorems of many well known as well as not well known implicational logics. In particular systems of rules are given which are equivalent to the relevance logics E→,R→, T, P-W and P-W-I.
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    Studia logica 41 (1982), S. 173-179 
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    Notes: Abstract In the first part of this paper we indicate how Meredith's condensed detachment may be used to give a new proof of Belnap's theorem that if every axiom x of a calculus S has the “two-property” that every variable which occurs in x occurs exactly twice in x, then every theorem of S is a substitution instance of a theorem of S which has the two-property. In the remainder of the paper we discuss the use of mechanical theorem-provers, based either on condensed detachment or on the resolution rule of J. A. Robinson, to investigate various calculi whose axioms all have the two-property. Particular attention is given to “D-groupoids”, i.e. sets of formulae which are closed under condensed detachment.
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    Studia logica 41 (1982), S. 283-291 
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    Notes: Abstract The aim of this paper is to present the Nyāya concept of number in the light of contemporary philosophy and to show that the Frege-Russell concept of number does not contradict the Nyāya concept of number but rather supplements it.
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    Studia logica 41 (1982), S. 329-341 
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    Notes: Abstract The main result of the present paper — Theorem 3 — establishes the equivalence of the interpolation and amalgamation properties for a large family of logics and their associated classes of matrices.
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    Studia logica 41 (1982), S. 359-374 
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    Notes: Abstract The aim of this paper is to give a general background and a uniform treatment of several notions of mutual interpretability. Sentential calculi are treated as preorders and logical invariants of adjoint situations, i.e. Galois connections are investigated. The class of all sentential calculi is treated as a quasiordered class. Some methods of the axiomatization of the M-counterparts of modal systems are based on particular adjoints. Also, invariants concerning adjoints for calculi with implication are pointed out. Finally, the notion of interpretability is generalized so that it may be applied to closure spaces as well.
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    Studia logica 41 (1982), S. 415-428 
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    Notes: Abstract In classes of algebras such as lattices, groups, and rings, there are finite algebras which individually generate quasivarieties which are not finitely axiomatizable (see [2], [3], [8]). We show here that this kind of algebras also exist in Heyting algebras as well as in topological Boolean algebras. Moreover, we show that the lattice join of two finitely axiomatizable quasivarieties, each generated by a finite Heyting or topological Boolean algebra, respectively, need not be finitely axiomatizable. Finally, we solve problem 4 asked in Rautenberg [10].
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    Studia logica 51 (1992), S. V 
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    Studia logica 51 (1992), S. 97-112 
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    Notes: Abstract We prove that Brouwer-Zadeh logic has the finite model property and therefore is decidable. Moreover, we present a bimodal system (BKB) which turns out to be characterized by the class of all Brouwer-Zadeh frames. Finally, we show that BrouwerZadeh logic can be translated into BKB.
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    Studia logica 51 (1992), S. 145-155 
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    Studia logica 51 (1992), S. 241-248 
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    Notes: Abstract We prove that all proofs in ω-logic (a first order logic with ω-rule added) in which ω-rule is used finitely many times can be turned into proofs in which the ω-rule is used at most one time. Next, we prove that the word “finitely” above cannot be changed by the word “infinitely”.
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    Studia logica 51 (1992), S. 249-277 
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    Notes: Abstract A nonempty sequence 〈T1,...,Tn〉 of theories is tolerant, if there are consistent theories T 1 + ,..., T n + such that for each 1 ≤i ≤n, T i + is an extension of Ti in the same language and, if i ≤n, T i + interprets T i+1 + . We consider a propositional language with the modality ◊, the arity of which is not fixed, and axiomatically define in this language the decidable logics TOL and TOLω. It is shown that TOL (resp. TOLω) yields exactly the schemata of PA-provable (resp. true) arithmetical sentences, if ◊(A1,..., An) is understood as (a formalization of) “〈 PA+A1, ..., PA+An〉 is tolerant”.
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    Studia logica 51 (1992), S. 165-193 
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    Notes: Abstract We give a Hilbert style axiomatization for the set of formulas in the temporal language with Until and Since which are valid over the real number flow of time. The axiomatization, which is orthodox in the sense of only having the usual temporal rules of inference, is complete with respect to single formulas.
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    Studia logica 51 (1992), S. 337-346 
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    Studia logica 51 (1992), S. 439-462 
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    Notes: Abstract In this paper, completed only months before his death, the author studies a number of concepts of importance for the analysis of intentional action. Four themes in particular are discussed: the intentionality of action, the practical syllogism, what the author terms “the practical causality of practical thinking”, and the proximate cause of action. (K. S.)
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    Studia logica 51 (1992), S. v 
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    Studia logica 51 (1992), S. 551-578 
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    Notes: Abstract Regular dynamic logic is extended by the program constructα∩β, meaning “α andβ executed in parallel”. In a semantics due to Peleg, each commandα is interpreted as a set of pairs (s,T), withT being the set of states “reachable” froms by a single execution ofα, possibly involving several processes acting in parallel. The modalities 〈α〈 and [α] are given the interpretations 〈α〉A is true ats iff there existsT withsRβT andA true throughoutT, and [α]A is true ats iff for allT, ifsRβT thenA is true throughoutT, which make 〈α〉 and [α] no longer interdefinable via negation, as they are in the regular case. We prove that the logic defined by this modelling is finitely axiomatisable and has the finite model property, hence is decidable. This requires the development a new theory of canonical models and filtrations for “reachability” relations.
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    Journal for general philosophy of science 13 (1982), S. 70-83 
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    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Zusammenfassung Der Geschichte des Begriffs des Naturgesetzes, besonders den Umständen seiner Durchsetzung, wird der systematische Hinweis entnommen, daß die generellen Sätze der Physik methodisch primär von Apparaten gelten. Daraus ergeben sich Gesichtspunkte für eine Hierarchisierung physikalischer Sätze. Eine technik-orientierte Deutung der Physik läßt dann auch die ökologische Dimension physikalischer Forschung in einem kritischeren Licht erscheinen.
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    Journal for general philosophy of science 13 (1982), S. 48-69 
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    Notes: Summary The paper's aim is to contribute to a better understanding of Weber's methodology by clarifying the difference of Weber's concept ofVerstehen from Dilthey's concept ofVerstehen, and by answering the question of how Weber's claim to objectivity of hisVerstehende Soziologie is compatible with his claim that the specific method of hisVerstehende Soziologie, the idealtypical construction, is empirically irrefutable. My thesis is that there are three classes of ideal types in Weber: concepts of ‚historical individuals‘, concepts of ‚objective possibilities‘ and idealtypical classifying concepts. Common to them is the end to grasp the individual character of a social phenomenon. Their different functions in realizing this end justify to describe Weber'sVerstehende Soziologie as a system, in which social phenomena are presented as if they were the result of conscious human decisions.
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    Journal for general philosophy of science 13 (1982), S. 166-173 
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    Journal for general philosophy of science 13 (1982), S. 234-279 
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    Notes: Zusammenfassung Die Wissenschaftstheorie hat sich in der Vergangenheit hauptsächlich mit dem Aufbau und der Analyse wissenschaftlicher Theorien und den logischen Problemen in ihrem eigenen Gebiet beschäftigt, während Probleme der Wissenschaftspraxis, hier vor allem die theoretischen Grundlagen des Messens, nur am Rande oder gar nicht behandelt wurden. Dies ist insofern bemerkenswert, weil die Messung das wichtigste erfahrungswissenschaftliche Hilfsmittel zur Gewinnung von Erkenntnis darstellt. Beim Messen erfolgt der wichtige Übergang vom Empirischen zum Formalen, indem die empirisch vorliegende Intensität einer Meßgröße durch eine mathematische Größe beschrieben und damit überhaupt erst die Voraussetzung für eine erfahrungswissenschaftliche Theorie geschaffen wird. Die vorliegende Meßtheorie ist in Meßprozeßtheorie, Metrisierungstheorie und Fehlertheorie gegliedert. Die Meßprozeßtheorie behandelt die Vorgänge zwischen Meßobjekt und Meßgerät, die Metrisierungstheorie die Darstellung der empirischen Größe als formale und die Fehlertheorie die Schätzung des gesuchten wahren Wertes aus mehreren fehlerbehafteten gleichwertigen Meßwerten. Der Schätzwert ist das Endergebnis einer Messung. Ziel der Arbeit ist es, die Meßtheorie aus dem engen Kreis der Metrisierungs- bzw. Skalentheorie herauszulösen und auf die häufig übersehenen notwendigen Bedingungen einer Messung aufmerksam zu machen.
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    Minds and machines 2 (1992), S. 323-323 
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    Minds and machines 2 (1992), S. 345-363 
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    Keywords: Music recognition ; cognitive musicology ; music ; AI
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    Notes: Abstract Tone semantics is a psychoacoustic-based theory of gestalt perception that deals with tone perception and the assignment of functional relationships between tones in the musical context. The theory provides an operational account of semantics in terms of complex dynamic systems theory and forms the basis for non-symbolic research in music imagination. This is illustrated by an application in the automatic recognition of tone centers from acoustical input. An analysis of the basic concepts and related epistemological and methodological principles reveals a promising paradigm for music research.
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    Minds and machines 2 (1992), S. 365-377 
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    Keywords: Musical competence ; musical processing ; modularity ; musical illusions ; computer models
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    Notes: Abstract The paper treats issues concerning the modular modelisation of musical mental processes. Some musical phenomena, like musical illusions, are explained in the framework of modularity and hypotheses are advanced in which the modular model seems very promising for the study of musical perception and cognition. In addition, arguments are proposed to distinguish between levels of abstraction and knowledge in musical cognitive processes. Moreover, some aspects about the theory of musical competence and the theory of musical processing are identified and the possibilities for the integration of varying theoretical assertions are considered in light of these distinctions.
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    Minds and machines 2 (1992), S. 27-49 
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    Keywords: Nonmonotonic ; inference ; logic ; conditionals ; consequence relations ; belief revision ; theory change ; defeasible reasoning ; knowledge representation
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    Notes: Abstract Recently, John Bell has proposed that a specific conditional logic, C, be considered as a serious candidate for formally representing and faithfully capturing various (possibly all) formalized notions of nonmonotonic inference. The purpose of the present paper is to develop evaluative criteria for critically assessing such claims. Inference patterns are described in terms of the presence or absence of residual classical monotonicity and intrinsic nonmonotonicity. The concept of a faithful representation is then developed for a formalism purported to encode a pattern of nonmonotonic inference already captured by another. In the main body of the paper these evaluative criteria are applied to assess (negatively) whether C or any conditional logic provides a faithful representation for nonmonotonic patterns of inference captured by inference operators and relations modeling the dynamics of belief change.
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    Minds and machines 2 (1992), S. 71-83 
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    Keywords: Neural networks ; dynetic problem ; infinite networks ; neural computability ; neurocomputing ; scalability ; stability problem ; Turing machine ; universal neural network ; cellular automata
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    Notes: Abstract The importance of the Stability Problem in neurocomputing is discussed, as well as the need for the study of infinite networks. Stability must be the key ingredient in the solution of a problem by a neural network without external intervention. Infinite discrete networks seem to be the proper objects of study for a theory of neural computability which aims at characterizing problems solvable, in principle, by a neural network. Precise definitions of such problems and their solutions are given. Some consequences are explored, in particular, the neural unsolvability of the Stability Problem for neural networks.
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    Minds and machines 2 (1992), S. 111-111 
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    Minds and machines 2 (1992), S. 145-174 
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    Keywords: AI, pragmatics ; ontopragmatics ; sociopragmatics ; psychopragmatics ; Turing Test ; interpretation ; reasoning ; humor ; meaning ; context ; dream ; mind ; language
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    Notes: Abstract Artificial intelligence, conceived either as an attempt to provide models of human cognition or as the development of programs able to perform ‘intelligent’ tasks, is primarily interested in theuses of language. It should be concerned, therefore, withpragmatics. But its concern with pragmatics should not be restricted to the narrow, traditional conception of pragmatics as the theory of communication (or of the social uses of language). In addition to that, AI should take into account also the ‘mental’ uses of language (in reasoning, for example) and the ‘existential’ dimensions of language as a determiner of the world we (and our computers) live in. In this paper, the relevance of these three branches of pragmatics-sociopragmatics, psychopragmatics, and ontopragmatics-for AI are explored.
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    Studia logica 41 (1982), S. 293-296 
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    Notes: Abstract Fregean logic has difficulty with certain arguments in which there is cross-reference between premises and conclusion. In this paper I describe a method of handling arguments of the troublesome kind: It involves replacing standard quantifiers with explicit existential statements, and turns standard logic into a free one. A validation procedure is provided for the logic.
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    Studia logica 41 (1982), S. 317-327 
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    Notes: Abstract It is shown that a locally finite polyadic algebra on an infinite set V of variables is a Boolean-algebra object, endowed with some internal supremum morphism, in the category of locally finite transformation sets on V. Then, this new categorical definition of polyadic algebras is used to simplify the theory of these algebras. Two examples are given: the construction of dilatations and the definition of terms and constants.
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    Studia logica 41 (1982), S. 351-358 
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    Notes: Abstract In this paper we study the reducibility order ⩽ m (defined in a natural way) over ∑ n 0 -equivalence relations. In particular, for every n〉 0 we exhibit ∑ n 0 -equivalence relations which are complete with respect to ⩽m and investigate some consequences of this fact (see Introduction).
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    Studia logica 41 (1982), S. 343-345 
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    Notes: Abstract Let q(K) denote the least quasivariety containing a given class K of algebraic structures. Mal'cev [3] has proved that q(K) = ISP r(K)(1). Another description of q(K) is given in Grätzer and Lakser [2], that is, q(K) = ISPP u(K)2. We give here other proofs of these results. The method which enables us to do that is borrowed from prepositional logics (cf. [1]).
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    Studia logica 41 (1982), S. 429-437 
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    Studia logica 51 (1992), S. 49-82 
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    Notes: Abstract This paper is a survey of results concerning embeddings of intuitionistic propositional logic and its extensions into various classical modal systems.
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    Studia logica 51 (1992), S. 157-164 
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    Studia logica 51 (1992), S. 215-239 
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    Notes: Abstract This paper is about the most important technical problem faced by Structured Meanings Semantics: the reiteration of hyperintensional functors (i.e., functors of Θ-categorial languages of the sort defined by Max Cresswell in [6]). A way to solve this problem in a general and natural way by using Scott's Domains is both suggested and shown. The result is a semantics which unrestrictedly allows reiterations of hyperintensional functors. The semantics is also extended to accommodate Θ-categorial languages with variables.
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    Journal for general philosophy of science 23 (1992), S. 1-32 
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    Keywords: Wissenschaftstheorie ; Statistik ; Falsifikationismus ; Testtheorie ; Hypothesentests ; Signifikanztests ; Neyman-Pearson-Theorie
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    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary It is widely held that falsification of statistical hypotheses is impossible. This view is supported by an analysis of the most important theories of statistical testing: these theories are not compatible with falsificationism. On the other hand, falsificationism yields a basically viable solution to the problems of explanation, prediction and theory testing in a deterministic context. The present paper shows how to introduce the falsificationist solution into the realm of statistics. This is done mainly by applying the concept of empirical content to statistical hypotheses. It is shown that empirical content is a substitute for ‘power’ as defined by Neyman and Pearson. Since the empirical content of a hypothesis is independent of alternative hypotheses, the proposed theory of statistical testing allows for tests of isolated hypotheses.
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    Journal for general philosophy of science 23 (1992), S. 45-60 
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    Keywords: critical philosophy of science ; constructivism ; critical theory of society ; finalization ; social natural science ; projective methodology of science
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    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary It is the purpose of this paper to represent an analysis of four variants of critical philosophy of science: the constructivistic methodology, the reflexion upon science from the viewpoint of the critical theory of society, the ‘social natural science’ as a further development of the finalization conception, and the projective philosophy of science. Special attention is paid to the comparison of these variants. Some points of convergence as well as of divergence among them are revealed. A common shortcoming is indicated.
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    Journal for general philosophy of science 23 (1992), S. 61-83 
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    Keywords: General relativity ; alternative proto-physical foundations ; gravity ; inertia ; cosmic redshift phenomena
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary It is suggested that the mathematically abstract coordinate frames of reference commonly visualized to be centered at the celestial bodies have real counterparts in the shape of well-defined rigid spatial resonant singularities of infinite extension, which accommodate the matter waves from the superimposition of which the body residing at the coordinate origin results. A universally valid inertial reference frame system is proposed. Qualitative explanations are offered for the inertial and gravitational forces, their observed proportionality, and for the occurrence of second-order gravitational effects in the vicinity of massive bodies. The universal redshift is assumed to result from a closure condition of the eigenspaces introduced.
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    Journal for general philosophy of science 23 (1992), S. 33-44 
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    Keywords: intercultural communication ; standardized terminologies ; ordering of knowledge ; cultural diversity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary In this paper we will discuss some epistemological aspects of lexical and terminological usage in the international arena, with special reference to the different rhetorics of the social and natural sciences. Sociolinguistic research confined to monolingual communities suggests that close-knit network structure is an important mechanism of language maintenance, in that speakers are able to form a cohesive group capable of resisting pressure, linguistic and social, from outside the group (MILROY, 1987). The concept of a linguistic norm in sociolinguistic theory can be viewed here as the product of “cultural focusing”. In the same way, intercultural communication is characterized by the spreading of standardized terminologies (ISO) and conceptual modes of thinking associated with a common scientific and technological practice in cross-border communities. A basic feature is frequent language interaction, based upon the need for scientific exchange and upon the extralinguistic models conveyed by powerful inter/transnational links and shared scientific paradigms. In this context, an international standard language could be seen as another case of cultural focusing, where intercultural contact would evolve along monocultural lines. However, a formally standardized language may conceal conceptual fuzziness, as has been shown for example in analyses of the kind of language used by social scientists (INTERCOCTA) or found in political rhetoric (ECCRDSS). The semantic and pragmatic differentiations of these latter forms of intercultural communication, and more generally, the interactions between the ordering of knowledge, the transfer of this knowledge through standardized language and the variety of cultural perceptions, call for a polylogic framework that accounts for their coexistence.
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    Journal for general philosophy of science 23 (1992), S. 85-103 
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    Keywords: life ; teleology ; evolution ; reality ; representation ; experience
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary A comprehensive definition of the phenomenon called “life” led to the addition of many dimensions to the natural sciences, and especially the conscious mental dimension. Historical attention is paid not only to those employing the natural philosophical paradigms, but also to evolutionary theories and to the Kantian teleological philosophy. The belief that science can solve the riddle of life is a category of purposal thinking. A revised version of critical teleology is essential for comprehension of life.
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    Journal for general philosophy of science 23 (1992), S. 105-128 
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    Keywords: abstraction ; alternative ; conception order ; hermeneutics ; methodology ; thing-in-itself ; transcendental idealism/realism ; truthfulness
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The researches on Kant are one example of the high degree of differences in opinions about mentalities. The lack of methods is one reason. Kant researchers have regretted this too. But as available methods are not developed, these regrets are not very convincing. For instance, the old method to sort concepts in different degrees of abstraction is not developed as a method of interpretation. This method will be exemplified for the question whether Kant was idealist or realist. It could have been an old well-known method as a method of interpretation, but this has not yet been done. Other reasons for this lack of methods are to be inquired. Some philosophical positions presuppose the lack of methods and this could be a fundamental reason for the lack of methods of interpretation.
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    Journal for general philosophy of science 23 (1992), S. 129-151 
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    Keywords: Science ; politics ; acceptance of theories ; dangerous knowledge ; self-censorship ; objectivity
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary In contrast to the opinion of numerous authors (e.g. R. Rudner, P. Kitcher, L. R. Graham, M. Dummett, N. Chomsky, R. Lewontin, etc.) it is argued here that the formation of opinion in science should be greatly insulated from political considerations. Special attention is devoted to the view that methodological standards for evaluation of scientific theories ought to vary according to the envisaged political uses of these theories.
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    Journal for general philosophy of science 23 (1992), S. 205-210 
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    Journal for general philosophy of science 23 (1992), S. 199-204 
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    Journal for general philosophy of science 23 (1992), S. 153-164 
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    Keywords: social science ; value-neutrality ; criticism ; methodological principles ; incompatibility of value-freedom with value-criticism ; philosophy of the social sciences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Among the methodological rules of the social sciences we find the principles of value-neutrality and the principle of criticism. Both principles are of vital importance in the social sciences, but both seem to conflict with one another. The principle of criticism excludes value-judgments from the social sciences, because they cannot be empirically tested. Hence, criticism methodologically implies value-neutrality. Yet there is the opposing view that it is precisely the critical social researcher who looks beyond mere ‘social facts’ taking into account the value framework of the society. Thus, criticism does not lead to value-freedom, but points to the value impact of the so-called social facts. In this paper, the two principles are stated. Then it is shown how and why they are incompatible. Finally, several suggestions are discussed to resolve this methodological conflict.
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    Journal for general philosophy of science 23 (1992), S. 165-197 
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    Keywords: Galileo ; Feyerabend ; methodological anarchism vs rationalism ; reasoning “ex suppositione” ; demonstrative regress ; experiment ; mathematics and reality ; falsification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary In analyzing Galileo's methodology, philosophers of science were using, misusing, and abusing his ideas rather unashamedly to suit their own purposes. Like so many others before him, Paul Feyerabend had come to the conclusion that his methodological ideas might gain momentum by demonstrating their compatibility with those of Galileo. The reinterpretation of Galileo as a true, though disguised, anarchist, was considered by Feyerabend as the most forceful, and indeed conclusive, case against rationalism in methodology which might be conceived in view of the privileged position ascribed to Galileo by both philosophers and historians of science. The paper argues — against Feyerabend — that Galileo was not a methodological anarchist, neither in theory nor in practice. He had firm methodological convictions that remained basically the same throughout his entire career. In his view, essential and accidental causes of phenomena were not given by experience. Although mathematical and geometrical analysis was needed to discriminate between them, experience and experiment was considered by Galileo from his middle periode on as a means to identify among the set of explanations, demonstrable “ex suppositione” as being mathematically correct, those which could in addition be applied to reality. Thus, Galileo was neither an inductivist nor a naive falsificationist, nor a Copernican zealot adapting his methodology to the needs of his presumed fight for heliocentrism, come what be. Only after the reconstruction of mechanics was in a fairly advanced stage, and after his own telescopic observations had provided independent evidence in favor of the new astronomy, Galileo was in a position to appreciate the Copernican system as a most forceful ally in his fight for the recognition of his physical achievements. Through the end of his life, his view of the heliocentric system remained rather traditional in adhering firmly to the principles of epicyclic and circular motion, as far as the heavens were concerned.
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    Journal for general philosophy of science 23 (1992), S. 213-222 
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    Keywords: normative epistemology ; naturalistic epistemology ; autopoietic cognitive organization ; transcendental propositions ; internal methodology of science
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Rather than attempting to combine the two meta-methodological programmes for justifying the epistemological study of science, which is the case of Laudan's normative naturalism, this paper aims at presenting a third alternative to the controversy between the traditional normativism and the reductionistic naturalism. The paper is a preliminary move in developing a theory of the autopoietic cognitive organization of science. The underlying assumption of this project calls that science is a self-constructing, self-specifying and homeostatic system. The scrutinizing of these three predicates leads to the view that the epistemological propositions about science cognitive organization are neither normative, nor descriptive, but transcendental ones. The final discussion shows the connection between this project and the theory of group rationality.
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    Journal for general philosophy of science 23 (1992), S. 241-263 
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    Keywords: sociology of science ; sociology of translation ; knowledge representations ; strong programme ; scientometrics ; methodology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Several, seemingly unrelated problems of empirical research in the ‘sociology of scientific knowledge’ can be analyzed as following from initial assumptions with respect to the status of the knowledge content of science. These problems involve: (1) the relation between the level of the scientific field and the group level; (2) the boundaries and the status of ‘contexts’, and (3) the emergence of so-called ‘asymmetry’ in discourse analysis. It is suggested that these problems can be clarified by allowing for cognitive factors as independent (‘heterogeneous’) variables, in addition to and in interaction with (i.e., not only as attributes of) social factors. In the ‘sociology of translation’, ‘heterogeneity’ among scientists, cognitions and textual elements has been made a basic assumption. This heterogeneity is bound together in an ‘actor network’. However, since the ‘actor network’ is an empirical category, the methodological problems remain unresolved. This has consequences for the relation between empirical data and theoretical inferences.
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    Journal for general philosophy of science 23 (1992), S. 223-239 
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    Keywords: logical positivism ; hermeneutics ; methodological separatism ; unity of science ; understanding ; interpretation ; structuralist view of theories ; holism ; literary criticism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary This dichotomy is discussed. First, by means of a short historical review, two theses are pointed out: (a) Originally scientific knowledge was regarded as a hermeneutical issue. (b) The separation into two methodological and scientific cultures is rather a ‘modern’ phenomenon. It was accomplished not before the 19th century as a product of the rise and final succes of the empirist-positivist paradigm for the so-called exact (natural) sciences and the analytic methodology. Further it is argued, that this separation turned out to be an unproductive one: The traditional logical positivist philosophy of science failed in integrating the interpretive practice of the humanities. On the other hand hermeneutical methodology failed in explicating its principles in a way, that could satisfy modern analytic standards. So it remained deficient in founding the postulated methodological autonomy of the humanities. However, the more the positivist background of the traditional philosophy of science crumbles, the more interest the methodological intuitions of hermeneutists seem to obtain. Finally, a new possibility to explicate the concept of interpretation by means of analytical instrumentary is drawn out: The so-called structuralist view of scientific theories (J. D. Sneed, W. Stegmüller e.a.) seems to explicate properly just that feature of hermeneutical interpretation, which remained unintelligible for the traditional philosophy of science. So some realistic chance appears to mediate the alleged systematic antithesis and to eliminate that methodological dichotomy. Last but not least, a number of new philosophical theories, not coming from hermeneutical side, are mentioned, in which the concept of interpretation is already used in a presystematic, i.e. an implicit and vague, sense. So to explicate that concept seems to me to be a necessary philosophical task at the present time.
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    Journal for general philosophy of science 23 (1992), S. 265-288 
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    Keywords: Evolutionary Epistemology ; Genetic Epistemology ; cognition (human knowledge) ; theories of truth ; explanation of validity claims by genetic means ; adaptation ; unity of selection ; reality ; constructivism ; relativism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary This essay is a discussion of Eve-Marie Engels' view on Evolutionary Epistemology (EE). In the first part two of the main doctrines of EE are criticized: (1.) that validity of human knowledge is to be explained as the result of evolutionary adaptation; yet (2.), that human cognitive capacities had been adequate to our ancestors life conditions but fail in relevant situations of modern world. In the second part the concept of reality underlying EE's adaptational view is discussed and compared with Jean Piaget's concept of reality. Finally, it is held that some of the questions recently raised by proponents of EE, far from being new, have been dealt with already in historical epistemology.
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    Journal for general philosophy of science 23 (1992), S. 313-314 
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    Keywords: special relativity ; Lorentz transformations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary U. Hoyer's argument for the linearity is discussed and a modification of the argument is proposed.
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    Journal for general philosophy of science 23 (1992), S. 289-311 
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    Keywords: parasitism ; speech-acts ; imperatives ; power ; (social) action ; normativity ; discourse analysis ; social theory
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary In this article it is argued that throughout Habermas' various treatments of the problem of ‘simple imperatives’ (threats etc.) one can find a remaining contradiction: namely between identifying them on the one hand, for logical reasons, as the ‘unsocial’ acts they are (due to their lack of normativity claims). On the other hand, for fitting into sociological descriptions, Habermas tries to rearrange threats etc. within a so-called ‘continuum’ of all social actions. These difficulties can only be avoided by recognizing the entirely unsocial character of certain ways of acting. This premiss is applied in an alternative analysis of perlocutions and simple imperatives. It leads to the conclusion that for the sake of logical consistency the possibility of ethical (social) ignorance — the Kantian ‘evil’? — must be brought into the categorical account of a grammatical analysis of practical statements.
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    Journal for general philosophy of science 23 (1992), S. 315-322 
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    Keywords: knowledge-based systems ; expert systems ; artificial intelligence ; philosophy of science ; philosophy of technology
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The following article is a response to K. Mainzer's ‘Knowledge-Based Systems; Remarks on the Philosophy of Technology and Artificial Intelligence’. We show, that Mainzer does not reach any of his aims to analyse the possibilities and limits of AI-technology. to reduce anxiousness and hostility against AI, which is motivated by phantastic speculations. to evaluate the factual impact of AI on our lives and on society. His article contributes on the contrary to phantastic speculations, which are not technologically justified in any way. There are two main reasons for his misleading view: (a) the state of the art of knowledge-based systems is incorrectly described; (b) the roots, paradigms and alternatives to AI are not in the least sufficiently analysed. We examine issues (a) and (b) in Chapter 1 and Chapter 2. In Chapter 3 we discuss, how the conclusions, which Mainzer draws, have to be modified. In analysing the lines of argumentation of Mainzer we try to clarify the methodological errors and the philosophical attitude of Mainzer, which is in many respects not adequate to the subject of the article.
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    Journal for general philosophy of science 23 (1992), S. 323-352 
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    Keywords: constructivism ; naturalism ; epistemology ; realism ; idealism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary Both radical constructivism and constructionism are naturalized approaches to epistemology. They try to fertilize results from biology and psychology for epistemological aims. They both refuse epistemological realism as unsustainable metaphysics. This raises the problem of the range of the naturalistic approach to epistemology. Constructivism, in both forms, turns out to be untenable because it runs in an aporia: it must borrow from realism either, or it must qualify its own position as a metaphysical one. But therewith, constructivism would be blamed to be metaphysical itself.
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    Journal for general philosophy of science 23 (1992), S. 353-357 
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    Keywords: East-West cultural relations ; chinese marxism ; maoism ; german idealism
    Source: Springer Online Journal Archives 1860-2000
    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary The Congress shows two tendencies: (1) A growing open-mindedness and concern for the surrounding pacific cultures and the West. (2) A Renaissance of classical studies in order to fuse genuine chinese with western ideas in a new transcultural dialogue. Occidental provincialists are invited to enter the debate.
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    Journal for general philosophy of science 23 (1992), S. 359-362 
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    Journal for general philosophy of science 23 (1992), S. 403-405 
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    Journal for general philosophy of science 23 (1992), S. 363-402 
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    Minds and machines 2 (1992), S. 1-16 
    ISSN: 1572-8641
    Keywords: Intention ; planning ; practical reasoning
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    Topics: Computer Science , Philosophy
    Notes: Abstract I sketch my general model of the roles of intentions in the planning of agents like us-agents with substantial resource limitations and with important needs for coordination. I then focus on the stability of prior intentions: their rational resistance to reconsideration. I emphasize the importance of cases in which one's nonreconsideration of a prior intention is nondeliberative and is grounded in relevant habits of reconsideration. Concerning such cases I argue for a limited form of two-tier consequentialism, one that is restricted in ways that aim at blocking an analogue of Smart's concerns about “rule-worship”. I contrast this with the unrestricted two-tier consequentialism suggested by McClennen. I argue that my restricted approach is superior for a theory of the practical rationality of reflective, planning agents like us. But I also conjecture that an unrestricted two-tier consequentialism may be more appropriate for the AI project of specifying a high level architecture for a resource-bounded planner.
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    Minds and machines 2 (1992), S. 109-109 
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    Minds and machines 2 (1992), S. 309-321 
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    Topics: Computer Science , Philosophy
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    Minds and machines 2 (1992), S. 283-307 
    ISSN: 1572-8641
    Keywords: Algorithms ; computers ; computer programs ; program executions (processes) ; program verification (‘correctness’ proofs, testing) ; representations (objects) ; software reliability
    Source: Springer Online Journal Archives 1860-2000
    Topics: Computer Science , Philosophy
    Notes: Abstract A proof of ‘correctness’ for a mathematical algorithm cannot be relevant to executions of a program based on that algorithm because both the algorithm and the proof are based on assumptions that do not hold for computations carried out by real-world computers. Thus, proving the ‘correctness’ of an algorithm cannot establish the trustworthiness of programs based on that algorithm. Despite the (deceptive) sameness of the notations used to represent them, the transformation of an algorithm into an executable program is a wrenching metamorphosis that changes a mathematical abstraction into a prescription for concrete actions to be taken by real computers. Therefore, it is verification of program executions (processes) that is needed, not of program texts that are merely the scripts for those processes. In this view, verification is the empirical investigation of: (a) the behavior that programs invoke in a computer system and (b) the larger context in which that behavior occurs. Here, deduction can play no more, and no less, a role than it does in the empirical sciences.
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    Journal for general philosophy of science 13 (1982), S. 84-98 
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    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Zusammenfassung Insoweit das Humesche Induktionsproblem die Frage der Rationalität des induktiven Vorgehens aufwirft, ist es in positiver Weise lösbar. Die Lösung basiert auf der Einsicht, daß es eine fundamentale Form der Induktion gibt, ohne welche Beobachtungen und Experimente überhaupt sinnlos würden, und ein rationales Verfahren zur Bestimmung einer induktiven Voraussetzung existiert, das eine bestimmte Fassung dieser Induktion validiert.
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    Journal for general philosophy of science 13 (1982), S. 99-109 
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    Topics: Philosophy , Nature of Science, Research, Systems of Higher Education, Museum Science
    Notes: Summary This paper presents an immanent criticism of Lakatos' reconstruction of the degenerating phase of Bohr's atomic theory. That is to say, the historiographical methods used are exclusively of a Lakatosian kind. Such a closer Lakatosian look at the historical episode in question shows that Lakatos' own reconstruction is incorrect on three essential points. These are the role of the correspondence principle, the position of the hard core in Bohr's programme, and the presence of important novel predicted facts. I conclude that these defects are irreparable within the framework of Lakatos' methodology of scientific research programmes.
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