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Single Idea 21602

[catalogued under 4. Formal Logic / E. Nonclassical Logics / 3. Many-Valued Logic]

Full Idea

It is an illusion that many-valued logic constitutes a well-motivated and rigorously worked out theory of vagueness. ...[top] There has been a reluctance to acknowledge higher-order vagueness, or to abandon classical logic in the meta-language.

Gist of Idea

Many-valued logics don't solve vagueness; its presence at the meta-level is ignored


Timothy Williamson (Vagueness [1994], 4.12)

Book Reference

Williamson,Timothy: 'Vagueness' [Routledge 1996], p.130

Related Idea

Idea 21596 Vagueness undermines the stable references needed by logic [Williamson]