6 ideas
14238 | A class is an aggregate of objects; if you destroy them, you destroy the class; there is no empty class [Frege] |
23647 | Objects have an essential constitution, producing its qualities, which we are too ignorant to define [Reid] |
14303 | Truth-functional conditionals have a simple falsification, when A is true and B is false [Peirce] |
11958 | Impossibilites are easily conceived in mathematics and geometry [Reid, by Molnar] |
23646 | Reference is by name, or a term-plus-circumstance, or ostensively, or by description [Reid] |
23645 | A word's meaning is the thing conceived, as fixed by linguistic experts [Reid] |