Ramseyan decision theory is the best explication of the philosophical model of folk-psychology. Davidson contends that its basic axioms are synthetic a priori truths of human psychology. This contention admits being reduced to the claim that human agents have to be regarded as rational betters. Tversky and Kahneman challenge this claim. Consideration of the evidence indicates that theory-contradicting interpretations of human actions make frequently more cognitive sense and are more 'commonsensical' than theory-preserving interpretations. Thus, the philosophical model of folk- psychology fails in two ways: as an empirical theory of human action and as a model of our folk-psychological interpretive practices.

Two approaches to cognitive dynamics are examined: the direct reference view, taken as represented in David Kaplan's positions, and the neo-Fregean view, taken as represented in Gareth Evans's positions. The upshot of the discussion is twofold. On the one hand, it is argued that both Kaplan's account and Evans's account are on the whole defective. On the other, it is claimed that a broadly Fregean theory is still to be preferred since by positing semantically efficacious modes of presentation it is clearly better equipped to deal adequately with some important phenomena in the area. In particular, it is claimed that the notion of a memory-based demonstrative mode of presentation of an object (a spatio-temporal particular, a region in space, a period of time, etc.) turns out to be indispensable for the purpose of accounting for the persistence of an important range of mental states with propositional content over time.

Hume fully recognised, and partially explained, the role of inductions from single experiments in human knowledge - something his Scottish critics, and some more recent ones, failed to understand. Those inferences, he maintains, depend on the use of a Newtonian rule and the removal of superfluous circumstances. But that rule is not sufficient, and Hume never stated the exact conditions of this removal. We should distinguish between survey and experience in his philosophy, to understand how experience of conjunctions where inductive knowledge has accumulated, in uniform or regular classes or sets of phenomena, may produce cognitive situations when once is enough - without relying on any mysterious innate principles.

The paper presents a historical account of the primacy of concepts in Frege's conception of logic. Moreover, it argues that Frege's priority-thesis (i.e., the assumption that judgeable contents are prior to concepts) does not imply that sentential logic is more basic than the logic of concepts in his thought.

Der gegenseitige Ausschluß der Farben ist nicht das Problem, worin die Aufgabe des logischen Atomismus Wittgensteins Tractatus Logico-Philosophicus wurzelt. Die im Tractatus durchgeführte Analyse der Arithmetik, führte zur Unanwendbarkeit der Zahlen auf die Messungszusammenhänge. Diese Analyse basierte auf einer Lösung, die in den Grundlagen der Arithmetik von Frege abgelehnt worden war. In seinem „Vortrag über die logische Form" zeigt Wittgenstein,daß die Zahlen nicht im Sinne der wiederholten Quantifizierungen definiert werden können. Die bereits in der Grundlage der Sprache eingeführten Zahlen zwingen zur Aufgabe der logischen Unabhängigkeit der Elementarsätze.

The philosophy of mathematics of the later Wittgenstein is normally not taken very seriously. According to a popular objection, it cannot account for mathematical necessity. Other critics have dismissed Wittgenstein's approach on the grounds that his anti-platonism is unable to explain mathematical objectivity. This latter objection would be endorsed by somebody who agreed with Paul Benacerraf that any anti-platonistic view fails to describe mathematical truth. This paper focuses on the problem proposed by Benacerraf of reconciling the semantics with the epistemology for mathematics. It is claimed that there is a way of solving Benacerrafs problem along the lines suggested by Wittgenstein's later remarks on mathematics. This will require demonstrating that a satisfactory conception of mathematical objectivity can be extracted from his mature philosophy.

The present work sets out to discuss in three main steps the roots of the indeterministic paradigm for quantum mechanics as against a causal explanation of reality. The first step is to present the fundamental role played by non-local Fourier analysis in the Copenhagen paradigm. The second is to present wavelet local analysis, a recent formalism that will perhaps allow the development of a new causal paradigm for physics. The third is to present the Heisenberg-Bohr uncertainty relations as a direct mathematical consequence of Fourier non-local analysis. Finally, experimental evidence violating these relations is presented. These results imply that the indeterministic approach has reached its limits. However, they can be explained within a causal framework allowing a more general mathematical formulation for uncertainty relations.

We address the impingement of Artificial Intelligence (AI) on logic, by examining the requirements posed on logic by knowledge representation and reasoning issues which A I has addressed. We then outline some of AI's contributions, via Logic Programming, to more dynamic forms of logic, in order to deal with knowledge in flux, namely: incomplete and contradictory information; hypotheses making through abduction; argumentation; diagnosis and debugging; updating; and learning. Along the way we delve into implications for the philosophy of knowledge.