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Ideas for 'fragments/reports', 'Difficulties of Transfinite Numbers and Types' and 'Knowledge and the Philosophy of Number'

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6. Mathematics / C. Sources of Mathematics / 1. Mathematical Platonism / a. For mathematical platonism

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We can only mentally construct potential infinities, but maths needs actual infinities [Hossack]

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

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

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