4 ideas
18883 | Any equivalence relation among similar things allows the creation of an abstractum [Simons] |
18884 | Abstraction is usually seen as producing universals and numbers, but it can do more [Simons] |
19399 | Prime matter is nothing when it is at rest [Leibniz] |
5470 | The idea of laws of nature arose in the Middle Ages [Hall,AR, by Ellis] |