 The supervenience thesis is also challenged by symmetry considerations. When confronted with a borderline case of ‘thin’, the argument goes, a language user will neither assent to the application of the term nor to the application of its negation. Patterns of dissent are similarly symmetrical with respect to the two  claims.[11]  And yet despite this symmetry at the level of use it must be broken at the level of truth and falsity where one of the terms or its negation truly applies according to the theory; one or the other claim is true and the other false. If our patterns of use leave the matter equally unsettled either way then how can the truth of the matter be settled without arbitrariness and a severing of the connection between meaning and use? The answer, Williamson suggests, lies in the fact that truth and falsity are not symmetrical notions. Falsity obtains in the absence of truth, so where there is symmetry at the level of use, falsity reigns. Whether this response succeeds is debated in Burgess 2001 and Weatherson 2003.