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Ideas for 'On the Question of Absolute Undecidability', 'There is no question of physicalism' and 'Difficulties of Transfinite Numbers and Types'

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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]