4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
16635 | Incorporeal substances are powers or forces [Descartes, by Pasnau] |
468 | Musical performance can reveal a range of virtues [Damon of Ath.] |
16684 | Impenetrability only belongs to the essence of extension [Descartes] |