James E. Tomberlin is Professor of Philosophy at California State University, Northridge, where he has taught since completing graduate study at Wayne State University in 1969. He has published more than seventy essays and reviews in action theory, deontic logic, metaphysics, philosophy of language, mind, religion, and the theory of knowledge. Besides editorship of the present series, he has edited Agent, Language and the Structure of the World (Hackett, 1983), Hector-Neri Casteneda, Profiles (D. Reidel, 1986) and he co-edited Alvin Plantinga, Profiles (D. Reidel, 1985).