Combining Texts
Ideas for
'On the Question of Absolute Undecidability', 'Principia Mathematica' and 'talk'
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5 ideas
4. Formal Logic / F. Set Theory ST / 1. Set Theory
17884
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Mathematical set theory has many plausible stopping points, such as finitism, and predicativism [Koellner]
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17893
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'Reflection principles' say the whole truth about sets can't be captured [Koellner]
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4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / p. Axiom of Reducibility
21720
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Russell saw Reducibility as legitimate for reducing classes to logic [Linsky,B on Russell/Whitehead]
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4. Formal Logic / F. Set Theory ST / 8. Critique of Set Theory
10044
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Russell denies extensional sets, because the null can't be a collection, and the singleton is just its element [Russell/Whitehead, by Shapiro]
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18208
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We regard classes as mere symbolic or linguistic conveniences [Russell/Whitehead]
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