13 ideas
| 19389 | Truth is a characteristic of possible thoughts [Leibniz] |
| 19388 | True and false seem to pertain to thoughts, yet unthought propositions seem to be true or false [Leibniz] |
| 8956 | What is a singleton set, if a set is meant to be a collection of objects? [Szabó] |
| 9358 | There are several logics, none of which will ever derive falsehoods from truth [Lewis,CI] |
| 9357 | Excluded middle is just our preference for a simplified dichotomy in experience [Lewis,CI] |
| 9364 | Names represent a uniformity in experience, or they name nothing [Lewis,CI] |
| 8953 | Abstract entities don't depend on their concrete entities ...but maybe on the totality of concrete things [Szabó] |
| 9362 | Necessary truths are those we will maintain no matter what [Lewis,CI] |
| 9365 | We can maintain a priori principles come what may, but we can also change them [Lewis,CI] |
| 8954 | Geometrical circles cannot identify a circular paint patch, presumably because they lack something [Szabó] |
| 9361 | We have to separate the mathematical from physical phenomena by abstraction [Lewis,CI] |
| 8955 | Abstractions are imperceptible, non-causal, and non-spatiotemporal (the third explaining the others) [Szabó] |
| 9363 | Science seeks classification which will discover laws, essences, and predictions [Lewis,CI] |