New in paperback. Hardcover was published in 2010. The tradition descending from Frege and Russell has typically treated theories of meaning either as theories of meanings (propositions expressed), or as theories of truth conditions. However, propositions of the classical sort don't exist, and truth conditions can't provide all the information required by a theory of meaning. In this book, one of the world's leading philosophers of language offers a way out of this dilemma.