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Ideas for 'Wiener Logik', 'Metaphysics: the logical approach' and 'Mathematical logic and theory of types'

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5. Theory of Logic / A. Overview of Logic / 3. Value of Logic

22275

Logic gives us the necessary rules which show us how we ought to think [Kant]

5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / d. Russell's paradox

6407	The class of classes which lack self-membership leads to a contradiction [Russell, by Grayling]