Combining Texts

All the ideas for 'Symbolic Reasoning', 'Human Freedom and Divine choice' and 'The Sign of Four'

expand these ideas     |    start again     |     specify just one area for these texts

---

3 ideas

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

21548

The null class is the class with all the non-existents as its members [MacColl, by Lackey]

9. Objects / D. Essence of Objects / 7. Essence and Necessity / a. Essence as necessary properties

13083

The essence is the necessary properties, and the concept includes what is contingent [Leibniz]

14. Science / C. Induction / 1. Induction

22200

If you eliminate the impossible, the truth will remain, even if it is weird [Conan Doyle]