What Is Identity?
The concept of identity has been seen to lead to a paradox: we cannot truly and usefully say that a thing is the same either as itself or as something else. Williams here examines this paradox in philosophical logic, and its implications for the philosophy of mathematics, the philosophy of mind, and relativism about identity.
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Plato to Russell
can help us to form a unified picture of the way in which the concept
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3x 3y px 3x px A. N. Prior abbreviation Akela analysis argument assert author of Waverley Begriffsschrift birthplace of Boscovich bore my wife Boscovich was born C-fibres Chapter concept of identity conjunction context Croatian holiday resort David deserves definite descriptions derelativization Dubrovnik entails equivalent event exclusive interpretation exist existential quantifier expression fact first-level predicable form 3x formula Frege Geach Hintikka identity propositions Identity Theorists Kripke meaning natural languages objects occurs one-place predicable open sentence operator paradox Parliament the day Paul thinks Percy says personal identity Peter struck philosophers predicate calculus present-day Croatian holiday proper names px & py Quine Quine's quotifiers Ragusa Ref Conj reflection reflexive pronoun relation rigid designators Russell Russell's Sarah schmidentity Scott sense Snmk someone St John substitution instance suppose symbolism syntactical category Theory of Descriptions things thought true truth two-place predicable Vn Vm 3k Wittgenstein Wittgensteinian words worried wrote Waverley