4 ideas
6410 | The only real proper names are 'this' and 'that'; the rest are really definite descriptions. [Russell, by Grayling] |
15990 | Every individual thing which exists has an essence, which is its internal constitution [Locke] |
16079 | De re modal predicates are ambiguous [Lewis, by Rudder Baker] |
15994 | If it is knowledge, it is certain; if it isn't certain, it isn't knowledge [Locke] |