8 ideas
9390 | Logic guides thinking, but it isn't a substitute for it [Rumfitt] |
13949 | All models of Peano axioms are isomorphic, so the models all seem equally good for natural numbers [Cartwright,R on Peano] |
18113 | PA concerns any entities which satisfy the axioms [Peano, by Bostock] |
17634 | Peano axioms not only support arithmetic, but are also fairly obvious [Peano, by Russell] |
15653 | We can add Reflexion Principles to Peano Arithmetic, which assert its consistency or soundness [Halbach on Peano] |
17635 | Arithmetic can have even simpler logical premises than the Peano Axioms [Russell on Peano] |
9389 | Vague membership of sets is possible if the set is defined by its concept, not its members [Rumfitt] |
19440 | How do you know you have conceived a thing deeply enough to assess its possibility? [Vaidya] |