  At least as Quine sees the matter, the use of the Principle of Tolerance puts analytic sentences on an entirely different epistemological footing from synthetic sentences. Synthetic sentences are answerable to evidence; analytic sentences are a matter of the choice of language, which does not require theoretical justification. Quine, however, rejects the idea that there is such an epistemological difference. Even if we can distinguish the analytic sentences from the synthetic sentences, we may still have reasons to reject an analytic sentence. And those reasons may be of the same kind that lead us to reject synthetic sentences. This point is hard to see if one focuses on examples such as “All bachelors are unmarried”. The matter is otherwise if one considers examples such as “Force equals mass times acceleration”. (See Putnam, 1962.) A change of mind about an analytic sentence would be a change in the language. Still, we might have reasons to make such a change, reasons that are of the same sort that lead us to make revisions to synthetic sentences. In that case, we have no more reason to apply Tolerance in the one kind of case than in the other.