Combining Texts

All the ideas for 'A Realistic Theory of Categories', 'Elucidation of some points in E.Schrder' and 'Reply to Richards'

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

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3 ideas

1. Philosophy / E. Nature of Metaphysics / 3. Metaphysical Systems

22140

The greatest philosophers are methodical; it is what makes them great [Grice]

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

14238

A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]

7. Existence / E. Categories / 3. Proposed Categories

13120

Chisholm divides things into contingent and necessary, and then individuals, states and non-states [Chisholm, by Westerhoff]