Combining Texts

Ideas for 'fragments/reports', 'Elucidation of some points in E.Schrder' and 'Laudatio: Prof Ruth Barcan Marcus'

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

display all the ideas for this combination of texts

---

2 ideas

4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula

15130

If a property is possible, there is something which can have it [Williamson]

4. Formal Logic / F. Set Theory ST / 3. Types of Set / b. Empty (Null) Set

14238

A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege]