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p.44
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p.17
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9548
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A mathematical object exists if there is no contradiction in its definition
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Full Idea:
A mathematical object exists provided there is no contradiction implied in its definition.
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From:
Robin Waterfield (Introduction to 'Hippias Minor' [1987], p.44), quoted by Charles Chihara - A Structural Account of Mathematics 1.4
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A reaction:
A rather bizarre criterion for existence. Not one, for example, that you would consider applying to the existence of physical objects! But then Poincaré is the father of 'conventionalism', rather than being a platonist.
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