ABSTRACT
The main purpose of Professor Quine’s article, Two Dogmas o f Empiricism, is to discredit a certain group of non-extensional notions, which includes those of logical
necessity, logical impossibility, and synonymity or identity of meaning. His article
contains, besides arguments directed to this aim, a certain characterization of truths
of logic. I shall try to show that this characterization is coherent only if we suppose
that it makes implicit use of one or more of the notions which it is the main purpose
of the article to discredit.
