Preface; Introduction; Chapter 1: The Principles of Leibnizian Metaphysics; Chapter 2: Leibniz and "The Liar" Paradox; Chapter 3: Hume and Conceivability; Chapter 4: Hume and Rationality; Chapter 5: The Rationale of Kantian Ethics; Chapter 6: Kant on a Key Difference between Philosophy and Science; Chapter 7: Pragmatic Perspectives; Chapter 8: Wittgenstein's Logocentrism; Chapter 9: Did Leibniz Anticipate Gödel?; Chapter 10: The Agenda of Philosophy; Index of Names