This collection of thirteen classic essays in philosophic semantics has become a major reference source for inquiry into the meaning of truth and the philosophy of language. Exact reproductions of the articles as they originally appeared, the papers cover a variety of semantic problems, all basic to the framework of the entire field but none too difficult or technical for the non-specialist, and none too particularized or simple for the intellectually mature student or reader. To list the authors is to name some of the greatest minds of our times: Rudolf Carnap, Nelson Goodman, Carl G. Hempel, C.I. Lewis, Paul Markhenke, Benson Mates, Arne Naess, Willard V. Quine, Bertrand Russell, Alfred Tarski, and Morton G. White.