8 ideas
12036 | Xenophanes began the concern with knowledge [Annas] |
12046 | Plato was the first philosopher who was concerned to systematize his ideas [Annas] |
9565 | Zermelo made 'set' and 'member' undefined axioms [Zermelo, by Chihara] |
3339 | For Zermelo's set theory the empty set is zero and the successor of each number is its unit set [Zermelo, by Blackburn] |
12037 | Euripides's Medea is a key case of reason versus the passions [Annas] |
12040 | Virtue is a kind of understanding of moral value [Annas] |
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |