Combining Texts

Ideas for 'The Nature of Things', 'Identity' and 'Letters to Leibniz'

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2 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

16519

No one can conceive of a possible substance, apart from those which God has created [Arnauld]

4. Formal Logic / F. Set Theory ST / 7. Natural Sets

9406	A class is natural when everybody can spot further members of it [Quinton]