5 ideas
17962 | The truth-maker principle is that every truth has a sufficient truth-maker [Forrest] |
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
15432 | Structural universals might serve as possible worlds [Forrest, by Lewis] |
14644 | If my conception of pain derives from me, it is a contradiction to speak of another's pain [Malcolm] |
1422 | God's existence is either necessary or impossible, and no one has shown that the concept of God is contradictory [Malcolm] |