4 ideas
21548 | The null class is the class with all the non-existents as its members [MacColl, by Lackey] |
15990 | Every individual thing which exists has an essence, which is its internal constitution [Locke] |
15994 | If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke] |
468 | Musical performance can reveal a range of virtues [Damon of Ath.] |