display all the ideas for this combination of texts
4 ideas
17286 | Logical consequence is verification by a possible world within a truth-set [Fine,K] |
8078 | Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin] |
6023 | Every proposition is either true or false [Chrysippus, by Cicero] |
4975 | A thought can be split in many ways, so that different parts appear as subject or predicate [Frege] |