Combining Philosophers
Ideas for Archimedes, Proclus and David Wiggins
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14 ideas
9. Objects / F. Identity among Objects / 1. Concept of Identity
11843
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Identity over a time and at a time aren't different concepts [Wiggins]
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11864
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Hesperus=Hesperus, and Phosphorus=Hesperus, so necessarily Phosphorus=Hesperus [Wiggins]
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9. Objects / F. Identity among Objects / 2. Defining Identity
11831
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The formal properties of identity are reflexivity and Leibniz's Law [Wiggins]
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16497
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Leibniz's Law (not transitivity, symmetry, reflexivity) marks what is peculiar to identity [Wiggins]
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16502
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Identity is primitive [Wiggins]
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16498
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Identity cannot be defined, because definitions are identities [Wiggins]
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9. Objects / F. Identity among Objects / 3. Relative Identity
14362
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Relative Identity is incompatible with the Indiscernibility of Identicals [Wiggins, by Strawson,P]
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11838
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Relativity of Identity makes identity entirely depend on a category [Wiggins]
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11847
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To identify two items, we must have a common sort for them [Wiggins]
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9. Objects / F. Identity among Objects / 6. Identity between Objects
16521
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A is necessarily A, so if B is A, then B is also necessarily A [Wiggins]
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9. Objects / F. Identity among Objects / 7. Indiscernible Objects
16505
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By the principle of Indiscernibility, a symmetrical object could only be half of itself! [Wiggins]
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9. Objects / F. Identity among Objects / 8. Leibniz's Law
11839
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Do both 'same f as' and '=' support Leibniz's Law? [Wiggins]
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11845
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Substitutivity, and hence most reasoning, needs Leibniz's Law [Wiggins]
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9. Objects / F. Identity among Objects / 9. Sameness
16494
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We want to explain sameness as coincidence of substance, not as anything qualitative [Wiggins]
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