This dissertation responds to the question, "To what extent can the pragmatist theories of truth of Peirce and James be defended against the major philosophical criticisms that have been used to dismiss them?" The answer to this depends to a great degree on the kind of formulation given these theories. Hence, one of the major goals of this dissertation is to express precisely and systematically Peirce's and James's theories of truth in such a way that only one of various possible (...) alternative expressions is identified as the interpretation that most remains faithful to the intentions of Peirce and James. Rather than offer merely a historical overview of these theories, I attempt a critical reformulation of them in the sense that I intervene to correct errors and aberrations in the theories as promulgated, either on my own responsibility or by reference to authoritative statements. The investigation consists of these parts: a comparison and contrast of Peirce's and James's pragmatic methods, in which it is suggested that James's medical background led him to a theory of meaning rather more broad in principle than Peirce's; an investigation of Peirce's theory of truth, in which his most famous formulation receives detailed exegesis; an investigation of James's theory of truth, in which it is argued that this theory should more properly be understood as a theory of knowledge; and an enumeration and evaluation of those major philosophical criticisms aimed at these theories, in which it is argued that the pragmatist theories have, indeed, been misunderstood, and that when correctly interpreted, they may be defended against these objections. (shrink)