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Ideas for 'Lectures 1930-32 (student notes)', 'The Empirical Stance' and 'Vagueness'

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3 ideas

5. Theory of Logic / D. Assumptions for Logic / 1. Bivalence

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'Bivalence' is the meta-linguistic principle that 'A' in the object language is true or false [Williamson]

5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle

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Excluded Middle is 'A or not A' in the object language [Williamson]

5. Theory of Logic / D. Assumptions for Logic / 3. Contradiction

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Contradiction is between two rules, not between rule and reality [Wittgenstein]