Exploring how new concepts are entered into our systems along with sufficient continuity with older ideas to ensure understanding, this text highlights the different aspects that present an insightful view into the various theories of concepts.

1. Studying Concepts 2. Conceptual Journeys 3. Some Theories of Concepts 4. Sellars: Exposition and Critique 5. Reconstruction 6. Clarifications, Responses, and Refinements 7. Conceptual Analysis I: Causation 8. Conceptual Analysis II: Epistemic Concepts 9. Case Studies I: Seventeenth Century Physics 10. Case Studies II: Interactions 11. Conceptual Change, Incommensurability, and Progress