Full Idea
A sorites paradox is stopped when it collides with a sorites paradox going in the opposite direction. That account will not strike a logician as solving the sorites paradox.
Gist of Idea
A sorites stops when it collides with an opposite sorites
Source
Timothy Williamson (Vagueness [1994], 3.3)
Book Reference
Williamson,Timothy: 'Vagueness' [Routledge 1996], p.87