Full Idea
Supervaluationism preserves almost all of classical logic, at the expense of classical semantics, but giving a non-standard account of truth. I argue that its treatment of higher-order vagueness undermines the non-standard account of truth.
Gist of Idea
Supervaluation keeps classical logic, but changes the truth in classical semantics
Source
Timothy Williamson (Vagueness [1994], Intro)
Book Reference
Williamson,Timothy: 'Vagueness' [Routledge 1996], p.5