Full Idea
A common complaint against the epistemic view is that to postulate a matter of fact in borderline cases is to suppose, incoherently, that the meanings of our words draw a line where our use of them does not.
Gist of Idea
If there is a true borderline of which we are ignorant, this drives a wedge between meaning and use
Source
Timothy Williamson (Vagueness [1994], 7.5)
Book Reference
Williamson,Timothy: 'Vagueness' [Routledge 1996], p.205
A Reaction
This doesn't necessarily seem to require the view that the meaning of words is their usage. Just that if there is one consensus on usage, it seems unlikely that there is a different underlying reality about the true meaning. Externalist meanings?