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Single Idea 21609

[catalogued under 7. Existence / D. Theories of Reality / 9. Vagueness / f. Supervaluation for vagueness]

Full Idea

Supervaluationists identify truth with 'supertruth'; since validity is necessary preservation of truth, they should identify it with necessary preservation of supertruth. But it plays no role in their definition of 'local' validity.

Gist of Idea

Supervaluationism defines 'supertruth', but neglects it when defining 'valid'

Source

Timothy Williamson (Vagueness [1994], 5.3)

A Reaction

[See text for 'local'] Generally Williamson's main concern with attempts to sort out vagueness is that higher-order and meta-language issues are neglected.

Book Reference

Williamson,Timothy: 'Vagueness' [Routledge 1996], p.148

Related Ideas

Idea 21607 Supervaluation has excluded middle but not bivalence; 'A or not-A' is true, even when A is undecided [Williamson]

Idea 21608 Truth-functionality for compound statements fails in supervaluation [Williamson]