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
Source
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]