Combining Philosophers
Ideas for Lynch,MP/Glasgow,JM, Robert S. Wolf and Pittacus
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / e. Axiom of the Empty Set IV
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Empty Set: ∃x∀y ¬(y∈x). The unique empty set exists [Wolf,RS]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / n. Axiom of Comprehension
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Comprehension Axiom: if a collection is clearly specified, it is a set [Wolf,RS]
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