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2015The Composition of ThoughtsNoûs 45 (1): 126-166. 2010.Are Fregean thoughts compositionally complex and composed of senses? We argue that, in Begriffsschrift, Frege took 'conceptual contents' to be unstructured, but that he quickly moved away from this position, holding just two years later that conceptual contents divide of themselves into 'function' and 'argument'. This second position is shown to be unstable, however, by Frege's famous substitution puzzle. For Frege, the crucial question the puzzle raises is why "The Morning Star is a planet" and…Read more
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1256In "Counting and Indeterminate Identity", N. Ángel Pinillos develops an argument that there can be no cases of `Split Indeterminate Identity'. Such a case would be one in which it was indeterminate whether a=b and indeterminate whether a=c, but determinately true that b≠c. The interest of the argument lies, in part, in the fact that it appears to appeal to none of the controversial claims to which similar arguments due to Gareth Evans and Nathan Salmon appeal. I argue for two counter-claims. Fir…Read more
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1207Consistency and the theory of truthReview of Symbolic Logic 8 (3): 424-466. 2015.This paper attempts to address the question what logical strength theories of truth have by considering such questions as: If you take a theory T and add a theory of truth to it, how strong is the resulting theory, as compared to T? Once the question has been properly formulated, the answer turns out to be about as elegant as one could want: Adding a theory of truth to a finitely axiomatized theory T is more or less equivalent to a kind of abstract consistency statement. A large part of the inte…Read more
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1925Truth in FregeIn Michael Glanzberg (ed.), The Oxford Handbook of Truth, Oxford University Press. pp. 193-213. 2018.A general survey of Frege's views on truth, the paper explores the problems in response to which Frege's distinctive view that sentences refer to truth-values develops. It also discusses his view that truth-values are objects and the so-called regress argument for the indefinability of truth. Finally, we consider, very briefly, the question whether Frege was a deflationist.
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275Syntactic reductionismPhilosophia Mathematica 8 (2): 124-149. 2000.Syntactic Reductionism, as understood here, is the view that the ‘logical forms’ of sentences in which reference to abstract objects appears to be made are misleading so that, on analysis, we can see that no expressions which even purport to refer to abstract objects are present in such sentences. After exploring the motivation for such a view, and arguing that no previous argument against it succeeds, sentences involving generalized quantifiers, such as ‘most’, are examined. It is then argued, …Read more
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841Frege's PrincipleIn Jaakko Hintikka (ed.), From Dedekind to Gödel: Essays on the Development of the Foundations of Mathematics, Kluwer Academic Publishers. 1995.This paper explores the relationship between Hume's Prinicple and Basic Law V, investigating the question whether we really do need to suppose that, already in Die Grundlagen, Frege intended that HP should be justified by its derivation from Law V.
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615Communication and Knowledge: Rejoinder to Byrne and ThauMind 105 (417). 1996.A reply to Byrne and Thau's criticisms of "The Sense of Communiction".
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1449Ramified Frege ArithmeticJournal of Philosophical Logic 40 (6): 715-735. 2011.Øystein Linnebo has recently shown that the existence of successors cannot be proven in predicative Frege arithmetic, using Frege’s definitions of arithmetical notions. By contrast, it is shown here that the existence of successor can be proven in ramified predicative Frege arithmetic
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