Combining Texts

All the ideas for 'Principles of Theoretical Logic', 'Philosophy in the Tragic Age of the Greeks' and 'Occasions of Identity'

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6 ideas

4. Formal Logic / C. Predicate Calculus PC / 1. Predicate Calculus PC

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The first clear proof of the consistency of the first order predicate logic was in 1928 [Hilbert/Ackermann, by Walicki]

9. Objects / B. Unity of Objects / 3. Unity Problems / b. Cat and its tail

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A CAR and its major PART can become identical, yet seem to have different properties [Gallois]

9. Objects / E. Objects over Time / 1. Objects over Time

16233

Gallois hoped to clarify identity through time, but seems to make talk of it impossible [Hawley on Gallois]

9. Objects / F. Identity among Objects / 3. Relative Identity

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Gallois is committed to identity with respect to times, and denial of simple identity [Gallois, by Sider]

9. Objects / F. Identity among Objects / 6. Identity between Objects

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Occasional Identity: two objects can be identical at one time, and different at others [Gallois, by Hawley]

23. Ethics / F. Existentialism / 5. Existence-Essence

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It is absurd to think you can change your own essence, like a garment [Nietzsche]