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Ideas for
'On the Question of Absolute Undecidability', 'Minds, Brains and Science' and 'Sets, Aggregates and Numbers'
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5 ideas
6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / d. Peano arithmetic
17887
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PA is consistent as far as we can accept, and we expand axioms to overcome limitations [Koellner]
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6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / g. Incompleteness of Arithmetic
17891
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Arithmetical undecidability is always settled at the next stage up [Koellner]
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6. Mathematics / B. Foundations for Mathematics / 5. Definitions of Number / c. Fregean numbers
17817
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Defining 'three' as the principle of collection or property of threes explains set theory definitions [Yourgrau]
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6. Mathematics / B. Foundations for Mathematics / 6. Mathematics as Set Theory / b. Mathematics is not set theory
17815
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We can't use sets as foundations for mathematics if we must await results from the upper reaches [Yourgrau]
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17821
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You can ask all sorts of numerical questions about any one given set [Yourgrau]
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