6 ideas
17743 | De Morgan introduced a 'universe of discourse', to replace Boole's universe of 'all things' [De Morgan, by Walicki] |
22518 | The actual must be possible, because it occurred [Aristotle] |
8793 | If observation is knowledge, it is not just an experience; it is a justification in the space of reasons [Sellars] |
8792 | Observations like 'this is green' presuppose truths about what is a reliable symptom of what [Sellars] |
8791 | The concept of 'green' involves a battery of other concepts [Sellars] |
16566 | Poetry is more philosophic than history, as it concerns universals, not particulars [Aristotle] |