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'Demonstratives', 'Introducing the Philosophy of Mathematics' and 'Taking Rights Seriously'
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4 ideas
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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The law of excluded middle is syntactic; it just says A or not-A, not whether they are true or false [Friend]
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5. Theory of Logic / G. Quantification / 7. Unorthodox Quantification
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Intuitionists read the universal quantifier as "we have a procedure for checking every..." [Friend]
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5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / a. Set theory paradoxes
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Paradoxes can be solved by talking more loosely of 'classes' instead of 'sets' [Friend]
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5. Theory of Logic / L. Paradox / 5. Paradoxes in Set Theory / c. Burali-Forti's paradox
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The Burali-Forti paradox asks whether the set of all ordinals is itself an ordinal [Friend]
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