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Metaphysics, Mathematics, and MeaningPhilosophical Papers, Volume I$
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Nathan Salmon

Print publication date: 2005

Print ISBN-13: 9780199284719

Published to Oxford Scholarship Online: February 2006

DOI: 10.1093/0199284717.001.0001

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The Fact that x = y (1987)

The Fact that x = y (1987)

(p.153) 8 The Fact that x = y (1987)
Metaphysics, Mathematics, and Meaning

Nathan Salmon (Contributor Webpage)

Oxford University Press

For any pair of objects, x and y, if x = y, then the fact that x = y is an identity fact. And conversely. (If x ≠ y, then there is no fact that x = y.) Among the facts that obtain in every possible world are all the identity facts. It is argued that the fact that x = y, is such exists, bears a very special relation to the trivial, a priori, fact that x = x: they are one and the same.

Keywords:   fact, identity

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