Preface. Introduction 1. Externalism, Anti-Realism and the KK Thesis 2. Choice Principles in Intuitionistic Set Theory 3. Assertion, Proof and the Axiom of Choice 4. Montague's Modal Completeness Theorem of 1955 5. On the Rational Reconstruction of our Theoretical Knowledge 6. Do We Have the Right Limitative Theorems 7. Empirical Negation in Intuitionistic Logic 8 Negation's Holiday: Aspectival Dialethism 9. Monism: The One True Logic Bibliography...