5 ideas
| 13099 | Analysing right down to primitive concepts seems beyond our powers [Leibniz] |
| 5022 | We hold a proposition true if we are ready to follow it, and can't see any objections [Leibniz] |
| 4398 | An event causes another just if the second event would not have happened without the first [Lewis, by Psillos] |
| 20972 | Joule showed that energy converts to heat, and heat to energy [Joule, by Papineau] |
| 20645 | Heat is a state of vibration, not a substance [Joule] |