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'works', 'De Veritate (On Truth)' and 'Principles of Arithmetic, by a new method'
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5 ideas
6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / d. Peano arithmetic
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All models of Peano axioms are isomorphic, so the models all seem equally good for natural numbers [Cartwright,R on Peano]
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PA concerns any entities which satisfy the axioms [Peano, by Bostock]
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Peano axioms not only support arithmetic, but are also fairly obvious [Peano, by Russell]
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6. Mathematics / B. Foundations for Mathematics / 4. Axioms for Number / g. Incompleteness of Arithmetic
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We can add Reflexion Principles to Peano Arithmetic, which assert its consistency or soundness [Halbach on Peano]
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6. Mathematics / C. Sources of Mathematics / 6. Logicism / a. Early logicism
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Arithmetic can have even simpler logical premises than the Peano Axioms [Russell on Peano]
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