display all the ideas for this combination of texts
4 ideas
8078 | Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin] |
8195 | Undecidable statements result from quantifying over infinites, subjunctive conditionals, and the past tense [Dummett] |
6023 | Every proposition is either true or false [Chrysippus, by Cicero] |
8194 | Surely there is no exact single grain that brings a heap into existence [Dummett] |