 Reichenbach’s mature views on the notion of analytic truth were complex. He no longer held with C.I. Lewis that there is at any time any sort of Kantian a priori—but there is synonymy, there are equivalent descriptions, and the assertion of equivalence between equivalent descriptions is presumably a purely logical matter, hence analytic. Although explicitly addressed to Carnap, C. I. Lewis was quite possibly an equal target of Quine’s “Two Dogmas of Empiricism” (1951). (As Quine’s senior at Harvard, Lewis was unlikely to be criticized by name.) In a brief essay on “Logical Positivism” in 1945, Russell gently but pointedly ridiculed Carnap’s disposition to resolve every apparently irresolvable dispute by appeal to linguistic relativism. Russell’s criticism, and Nelson Goodman’s criticism of the very idea of synonymy (Goodman, 1949), but perhaps not Quine’s, could have been applied to Reichenbach. 