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'Material Beings', 'Characteristics' and 'Presidential Address of Am. Math. Soc'
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4 ideas
5. Theory of Logic / A. Overview of Logic / 2. History of Logic
10247
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We have no adequate logic at the moment, so mathematicians must create one [Veblen]
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5. Theory of Logic / D. Assumptions for Logic / 2. Excluded Middle
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The 'Law' of Excluded Middle needs all propositions to be definitely true or definitely false [Inwagen]
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5. Theory of Logic / E. Structures of Logic / 4. Variables in Logic
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Variables are just like pronouns; syntactic explanations get muddled over dummy letters [Inwagen]
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5. Theory of Logic / L. Paradox / 6. Paradoxes in Language / b. The Heap paradox ('Sorites')
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There are no heaps [Inwagen]
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