Combining Texts

All the ideas for 'Elucidation of some points in E.Schröder', 'Geometrical Method and Metaphysics' and 'Categories, Classification, Cogn. Anthropology'

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

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 / 2. Categorisation

10494

Several words may label a category; one word can name several categories; some categories lack words [Ellen]

14. Science / D. Explanation / 2. Types of Explanation / g. Causal explanations

19398

Minds are best explained by their ends, and bodies by efficient causes [Leibniz]