Frontmatter -- PREFACE -- TABLE OF CONTENTS -- 1. SYSTEMS AND META-ONTOLOGY -- 2. VERIFICATIONS, TOLERANCE, AND EXTERNAL QUESTIONS -- 3. CATEGORIES AND ONTOLOGY -- 4. CARNAP AND QUINE ON ONTOLOGICAL COMMITMENT -- 5. ANALYTICITY AND EXTERNALITY -- 6. EXTERNALITY AND RATIONALITY -- 7. METAPHILOSOPHICAL CONCLUSIONS -- BIBLIOGRAPHY -- INDEX