Combining Texts

Ideas for 'fragments/reports', 'The Justification of Deduction' and 'Vagueness'

expand these ideas     |    start again     |     choose another area for these texts

display all the ideas for this combination of texts

---

3 ideas

5. Theory of Logic / B. Logical Consequence / 2. Types of Consequence

19058

Syntactic consequence is positive, for validity; semantic version is negative, with counterexamples [Dummett]

5. Theory of Logic / B. Logical Consequence / 4. Semantic Consequence |=

21611

Formal semantics defines validity as truth preserved in every model [Williamson]

5. Theory of Logic / B. Logical Consequence / 5. Modus Ponens

8078	Modus ponens is one of five inference rules identified by the Stoics [Chrysippus, by Devlin]