7 ideas
19426 | 'Nominal' definitions just list distinguishing characteristics [Leibniz] |
18189 | ZFC could contain a contradiction, and it can never prove its own consistency [MacLane] |
19424 | Knowledge needs clarity, distinctness, and adequacy, and it should be intuitive [Leibniz] |
19427 | True ideas represent what is possible; false ideas represent contradictions [Leibniz] |
1748 | Archelaus was the first person to say that the universe is boundless [Archelaus, by Diog. Laertius] |
19425 | In the schools the Four Causes are just lumped together in a very obscure way [Leibniz] |
5989 | Archelaus said life began in a primeval slime [Archelaus, by Schofield] |