Richard Cartwright's impact on other philosophers has been as much a product of his own personal contact with students and colleagues as the result of his written work. The essays in this book demonstrate the deep influence he has had, not only by his thinking but equally by his style and manner and, above all, by his clarity and purity of intention. All of the essays are concerned with the questions of logic, language, and metaphysics that have been at the core of Cartwright's own work. The chapters and their authors are: The Consistency of Frege's Foundations of Arithmetic, George Boolos. Russell's "No-Classes" Theory of Classes, Leonard Linsky. Quine's Indeterminacy, Charles S. Chihara. Justifying Symbolizations, Harold Levin. Substitutivity, Scott Soames. Moore-Paradox, Sincerity Conditions, and Epistemic Qualification, Charles E. Caton. Matching Illocutionary Act Types, William P. Alston. Scattered Objects, Roderick M. Chisholm. Parts and Places, Helen Morris Cartwright. Ruminations on an Account of Personal Identity, Judith Jarvis Thomson. Godel's Ontological Proof, Jordan Howard Sobel. "The Concept of the Subject Contains the Concept of the Predicate," David Wiggins. Judith Jarvis Thomson is Professor of Philosophy at MIT. Philosophical Essays, the first collection of Richard Cartwright's work, is being published simultaneously by The MIT Press.