Combining Texts

All the ideas for 'Clitophon', 'Difficulties of Transfinite Numbers and Types' and 'Symbolic Reasoning'

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

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4 ideas

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

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

6. Mathematics / C. Sources of Mathematics / 10. Constructivism / d. Predicativism

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'Predicative' norms are those which define a class [Russell]

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We need rules for deciding which norms are predicative (unless none of them are) [Russell]

22. Metaethics / B. Value / 2. Values / f. Altruism

1590	The just man does not harm his enemies, but benefits everyone [Plato]