Modal Identities and de Re Necessity
Dissertation, University of California, Berkeley (
1992)
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Abstract
I discuss one version of a puzzle about the identity of a statue with the lump of clay of which it is made. The case is one in which the statue and lump agree in all their non-modal features. While this is a favorable case for the claim that they are identical, we nonetheless have discrepant intuitions about their potentialities, which appear irreconcilable. Critical analyses are given of recent treatments by Allan Gibbard, Kit Fine, and Stephen Yablo. An ontologically conservative solution to the puzzle is offered which has the following features: the statue and lump of clay are said to be identical, our discrepant modal intuitions about the statue and lump are validated, identity is necessary, and is a relation between objects, not concepts, Leibniz' Law is not constrained, only a standard modal logic and semantics is needed, and our modal logical intuitions are preserved. In part, this last consists in proving that standard modal logics have certain structural features. In addition, the proposed account allows that names have the same function in and out of modal contexts, namely just to refer. As well, it allows genuine de re modality, i.e. that things have genuine modal properties. How the account meets general concerns about de re modality and essentialism is discussed. The proposed method of solution is also shown to apply to a number of other modal puzzles