Rudolf Carnap and W. V. Quine, two of the twentieth century's most important philosophers, corresponded at length - and over a long period of time - on matters personal, professional, and philosophical. Their friendship encompassed issues and disagreements that go to the heart of contemporary philos[...]

"This book is valuable as expounding in full a theory of meaning that has its roots in the work of Frege and has been of the widest influence. . . . The chief virtue of the book is its systematic character. From Frege to Quine most philosophical logicians have restricted themselves by piecemeal and [...]

In this text, Rudolf Carnap analyzes the fundamental elements of experience, the derivation of qualities, the construction of sensory classes and the construction of the special and temporal orders.[...]