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All the ideas for 'Purifications (frags)', 'Introduction to Russell's Theory of Types' and 'The Nature of Existence vol.1'
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility
18170
The Axiom of Reducibility is self-effacing: if true, it isn't needed
[Quine]
9. Objects / B. Unity of Objects / 2. Substance / d. Substance defined
22628
Substance has to exist, with no intrinsic qualities or relations
[McTaggart]