12 ideas
| 9987 | An aggregate in which order does not matter I call a 'set' [Bolzano] |
| 10856 | A truly infinite quantity does not need to be a variable [Bolzano] |
| 15990 | Every individual thing which exists has an essence, which is its internal constitution [Locke] |
| 15086 | Absolute necessity might be achievable either logically or metaphysically [Hale] |
| 8261 | Maybe not-p is logically possible, but p is metaphysically necessary, so the latter is not absolute [Hale] |
| 15081 | A strong necessity entails a weaker one, but not conversely; possibilities go the other way [Hale] |
| 15080 | 'Relative' necessity is just a logical consequence of some statements ('strong' if they are all true) [Hale] |
| 15082 | Metaphysical necessity says there is no possibility of falsehood [Hale] |
| 15085 | 'Broadly' logical necessities are derived (in a structure) entirely from the concepts [Hale] |
| 15088 | Logical necessities are true in virtue of the nature of all logical concepts [Hale] |
| 15087 | Conceptual necessities are made true by all concepts [Hale] |
| 15994 | If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke] |