Isaac Levi, currently John Dewey Professor of Philosophy at Columbia University, has explored the principles of American pragmatism in greater depth and more consistency than others before him. The result is a sophisticated and powerful philosophical system whose key elements stand in stark opposition not only to current mainstream epistemology, but also to the positions of other contemporary authors writing in the same pragmatist tradition. The essays in this timely volume, written by some of philosophy's finest scholars, contribute substantially to the understanding and appraisal of Levi's work.