Combining Philosophers

Ideas for H.Putnam/P.Oppenheim, Fabrice Correia and Feferman / Feferman

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

display all the ideas for this combination of philosophers

---

3 ideas

5. Theory of Logic / K. Features of Logics / 4. Completeness

10161

If a sentence holds in every model of a theory, then it is logically derivable from the theory [Feferman/Feferman]

5. Theory of Logic / K. Features of Logics / 7. Decidability

10156

'Recursion theory' concerns what can be solved by computing machines [Feferman/Feferman]

10155

Both Principia Mathematica and Peano Arithmetic are undecidable [Feferman/Feferman]