Combining Texts

Ideas for 'Concerning the Author', '75: Is 'Live Unknown' a Wise Precept?' and 'Intro: Theories of Vagueness'

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

display all the ideas for this combination of texts

---

1 idea

4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / h. System S5

9065	S5 collapses iterated modalities (◊□P→□P, and ◊◊P→◊P) [Keefe/Smith]