Existence, freedom, identity, and the logic of abstractionist realism
Mind 116 (461):23-53 (2007)
| Abstract | From the point of view of proof-theoretic semantics, we examine the logical background invoked by Neil Tennant's abstractionist realist account of mathematical existence. To prepare the way, we must first look closely at the rule of existential elimination familiar from classical and intuitionist logics and at rules governing identity. We then examine how well free logics meet the harmony and uniqueness constraints familiar from the proof-theoretic semantics project. Tennant assigns a special role to atomic formulas containing singular terms. This, we find, secures harmony and uniqueness but militates against the putative realism. | |||||||||
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William R. Stirton (2008). Some Problems for Proof-Theoretic Semantics. Philosophical Quarterly 58 (231):278–298.
Neil Tennant (1987). Anti-Realism and Logic: Truth as Eternal. Oxford University Press.
Ole T. Hjortland (2009). The Structure of Logical Consequence : Proof-Theoretic Conceptions. Dissertation, University of St Andrews
Robert Goldblatt (2011). Quantifiers, Propositions, and Identity: Admissible Semantics for Quantified Modal and Substructural Logics. Cambridge University Press.
Jon Cogburn (2003). Manifest Invalidity: Neil Tennant's New Argument for Intuitionism. Synthese 134 (3):353 - 362.
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Peter Milne (2007). Existence and Identity in Free Logic: Two Comments. Mind 116 (464):1079 - 1081.
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