Full Idea
A striking fearure of supervaluations is the failure of truth-functionality for compound statements.
Gist of Idea
Truth-functionality for compound statements fails in supervaluation
Source
Timothy Williamson (Vagueness [1994], 5.3)
A Reaction
Supervaluations has the initial appearance of enhancing classical logic, but turns out to somewhat undermine it. Hence Williamson's lack of sympathy. But see Idea 21610.
Book Reference
Williamson,Timothy: 'Vagueness' [Routledge 1996], p.146
Related Idea
Idea 21607 Supervaluation has excluded middle but not bivalence; 'A or not-A' is true, even when A is undecided [Williamson]