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Ideas for 'Lectures 1930-32 (student notes)', 'works' and 'Causes and Counterfactuals'

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5. Theory of Logic / A. Overview of Logic / 1. Overview of Logic

18724

In logic nothing is hidden [Wittgenstein]

5. Theory of Logic / A. Overview of Logic / 2. History of Logic

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Gentzen introduced a natural deduction calculus (NK) in 1934 [Gentzen, by Read]