Why do you think Kuhn calls factual novelties “discoveries” and theoretic novelties “inventions” (pp 52-53)?

•  Kuhn later says that the case of oxygen prompts the “impossible suggestion” that Priestley first discovered it and Lavoisier then invented it—what about the case suggests this description (pp. 53-56; the later comment is on p. 66)?

•  How is the discovery of X-rays like and, especially, how is it different from the discovery of oxygen (pp. 57-61)?

•  What is shown by the example of the Leyden jar (pp. 61-62)?

•  What features do the phenomena described by Bruner and Postman share with scientific discovery (pp. 62-64)?

•  Why does Kuhn think normal science is effective in producing novelty (pp. 64-65)?

•  What are Kuhn’s three examples of the emergence of new scientific theory and what are their common features (pp. 66-75)?

•  What is shown by the existence of anticipations of these inventions (pp. 75-76)?