11 ideas
| 291 | Don't assume that wisdom is the automatic consequence of old age [Plato] |
| 5035 | The two basics of reasoning are contradiction and sufficient reason [Leibniz] |
| 15527 | Defining terms either enables elimination, or shows that they don't require elimination [Lewis] |
| 15530 | A logically determinate name names the same thing in every possible world [Lewis] |
| 15531 | The Ramsey sentence of a theory says that it has at least one realisation [Lewis] |
| 15528 | A Ramsey sentence just asserts that a theory can be realised, without saying by what [Lewis] |
| 15526 | There is a method for defining new scientific terms just using the terms we already understand [Lewis] |
| 15529 | It is better to have one realisation of a theory than many - but it may not always be possible [Lewis] |
| 5038 | Assume that mind and body follow their own laws, but God has harmonised them [Leibniz] |
| 293 | Being unafraid (perhaps through ignorance) and being brave are two different things [Plato] |
| 5037 | God doesn't decide that Adam will sin, but that sinful Adam's existence is to be preferred [Leibniz] |