Combining Philosophers
Ideas for Richard T.W. Arthur, Robert C. Stalnaker and Thomas Jefferson
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 / D. Modal Logic ML / 3. Modal Logic Systems / a. Systems of modal logic
16468
|
Non-S5 can talk of contingent or necessary necessities [Stalnaker]
|
4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula
18823
|
To say there could have been people who don't exist, but deny those possible things, rejects Barcan [Stalnaker, by Rumfitt]
|
4. Formal Logic / F. Set Theory ST / 4. Axioms for Sets / b. Axiom of Extensionality I
16449
|
In modal set theory, sets only exist in a possible world if that world contains all of its members [Stalnaker]
|