4 ideas
18398 | Space, time, and some other basics, are not causal powers [Ellis] |
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] |
2116 | The concept of an existing thing must contain more than the concept of a non-existing thing [Leibniz] |