Full Idea
If objects can have fuzzy spatial boundaries, surely they can have fuzzy temporal, modal or mereological boundaries too.
Gist of Idea
If fuzzy edges are fine, then why not fuzzy temporal, modal or mereological boundaries?
Source
Timothy Williamson (Vagueness [1994], 9.2)
Book Reference
Williamson,Timothy: 'Vagueness' [Routledge 1996], p.256
A Reaction
Fair point. I think there is a distinction between parts of the thing, such as its edges, being fuzzy, and the whole thing being fuzzy, in the temporal case.