4 ideas
| 16861 | A false theory could hardly rival the explanatory power of natural selection [Darwin] |
| 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] |
| 19087 | The meaning or purport of a symbol is all the rational conduct it would lead to [Peirce] |