Combining Philosophers

Ideas for B Hale / C Wright, Mark Colyvan and Alfred Tarski

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

display all the ideas for this combination of philosophers

---

3 ideas

4. Formal Logic / B. Propositional Logic PL / 3. Truth Tables

19195

Truth tables give prior conditions for logic, but are outside the system, and not definitions [Tarski]

4. Formal Logic / E. Nonclassical Logics / 2. Intuitionist Logic

17926

Rejecting double negation elimination undermines reductio proofs [Colyvan]

17925

Showing a disproof is impossible is not a proof, so don't eliminate double negation [Colyvan]