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Thomas Samuel Kuhn

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Normal science, the activity in which most scientists inevitably spend most all their time, is predicated on the assumption that the scientific community knows what the world is like. Normal science, often suppresses fundamental novelties because they are necessarily subversive of its basic commitments. As a puzzle-solving activity, normal science not aim at novelties of fact or theory and, when successful, finds none.
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Thomas Samuel Kuhn

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