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'works', 'The Philosophy of Mathematics' and 'Ontological Categories'
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5 ideas
5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
9195
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Intuitionists reject excluded middle, not for a third value, but for possibility of proof [Dummett]
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5. Theory of Logic / E. Structures of Logic / 1. Logical Form
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For Aristotle, the subject-predicate structure of Greek reflected a substance-accident structure of reality [Aristotle, by O'Grady]
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5. Theory of Logic / F. Referring in Logic / 1. Naming / a. Names
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We negate predicates but do not negate names [Westerhoff]
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5. Theory of Logic / G. Quantification / 5. Second-Order Quantification
9186
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First-order logic concerns objects; second-order adds properties, kinds, relations and functions [Dummett]
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5. Theory of Logic / I. Semantics of Logic / 3. Logical Truth
9187
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Logical truths and inference are characterized either syntactically or semantically [Dummett]
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