Combining Texts

All the ideas for 'Confessions of a Philosopher', 'Science and Method' and 'Elucidation of some points in E.Schrder'

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]

6. Mathematics / A. Nature of Mathematics / 2. Geometry

10245

One geometry cannot be more true than another [Poincaré]

16. Persons / C. Self-Awareness / 3. Limits of Introspection

3102	Why don't we experience or remember going to sleep at night? [Magee]