Combining Texts

All the ideas for 'The Union of Body and Soul', 'Elucidation of some points in E.Schrder' and 'Review of Frege's 'Grundlagen''

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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 / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers

9992	The 'extension of a concept' in general may be quantitatively completely indeterminate [Cantor]

26. Natural Theory / C. Causation / 9. General Causation / d. Causal necessity

2594	A true cause must involve a necessary connection between cause and effect [Malebranche]