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Philosophical Introduction: The Background Theory. 2. Unphilosophical Introduction: What Concepts Have To Be. 3. The Demise of Definitions, Part I: The Linguist's Tale. 4. The Demise of Definitions, Part II: The Philosopher's Tale. 5. Prototypes and Compositionality. (Appendix 5A: Meaning Postulates. Appendix 5B: The 'Theory Theory' of Concepts.) 6. Innateness and Ontology, Part I: The Standard Argument. (Appendix 6A: Similarity.) 7. Innateness and Ontology, Part II: Intentional Laws and Natural Kinds. (Appendix 7A: Round Squares.) Bibliography Index
Bach et al. (Sun,) studied this question.