4 ideas
10801 | Either reference really matters, or we don't need to replace it with substitutions [Quine] |
13083 | The essence is the necessary properties, and the concept includes what is contingent [Leibniz] |
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] |