Combining Texts

All the ideas for 'Symbolic Reasoning', 'Isagoge ('Introduction')' and 'Letters'

expand these ideas     |    start again     |     specify just one area for these texts

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3 ideas

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

21548

The null class is the class with all the non-existents as its members [MacColl, by Lackey]

8. Modes of Existence / D. Universals / 1. Universals

15034

Are genera and species real or conceptual? bodies or incorporeal? in sensibles or separate from them? [Porphyry]

19. Language / E. Analyticity / 4. Analytic/Synthetic Critique

21338

I will even consider changing a meaning to save a law; I question the meaning-fact cleavage [Quine]