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Ideas for 'Thinking About Mathematics', 'thirty titles (lost)' and 'Three Grades of Modal Involvement'

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2 ideas

9. Objects / B. Unity of Objects / 2. Substance / c. Types of substance

594	Speusippus suggested underlying principles for every substance, and ended with a huge list [Speussipus, by Aristotle]

9. Objects / D. Essence of Objects / 9. Essence and Properties

10923

Aristotelian essentialism says a thing has some necessary and some non-necessary properties [Quine]