15 ideas
| 14249 | Boolos reinterprets second-order logic as plural logic [Boolos, by Oliver/Smiley] |
| 10830 | Second-order logic metatheory is set-theoretic, and second-order validity has set-theoretic problems [Boolos] |
| 10829 | A sentence can't be a truth of logic if it asserts the existence of certain sets [Boolos] |
| 10832 | '∀x x=x' only means 'everything is identical to itself' if the range of 'everything' is fixed [Boolos] |
| 10834 | Weak completeness: if it is valid, it is provable. Strong: it is provable from a set of sentences [Boolos] |
| 13841 | Why should compactness be definitive of logic? [Boolos, by Hacking] |
| 10833 | Many concepts can only be expressed by second-order logic [Boolos] |
| 19513 | A contextualist coherentist will say that how strongly a justification must cohere depends on context [DeRose] |
| 19514 | Classical invariantism combines fixed truth-conditions with variable assertability standards [DeRose] |
| 19515 | We can make contextualism more precise, by specifying the discrimination needed each time [DeRose] |
| 19510 | In some contexts there is little more to knowledge than true belief. [DeRose] |
| 19516 | Contextualists worry about scepticism, but they should focus on the use of 'know' in ordinary speech [DeRose] |
| 19511 | If contextualism is about knowledge attribution, rather than knowledge, then it is philosophy of language [DeRose] |
| 12719 | Clearly, force is that from which action follows, when unimpeded [Leibniz] |
| 12720 | Time doesn't exist, since its parts don't coexist [Leibniz] |