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] |
8173 | Language can violate bivalence because of non-referring terms or ill-defined predicates [Dummett] |
6023 | Every proposition is either true or false [Chrysippus, by Cicero] |
8179 | The law of excluded middle is the logical reflection of the principle of bivalence [Dummett] |