display all the ideas for this combination of texts
2 ideas
| 21410 | That a concept is not self-contradictory does not make what it represents possible [Kant] |
| Full Idea: That the concept of a thing is possible (not self-contradictory) is not yet sufficient for assuming the possibility of the thing itself (the objective reality of the concept). | |
| From: Immanuel Kant (Metaphysics of Morals II:Doctrine of Virtue [1797], 382 Intro I) | |
| A reaction: I take this to be an inkling of Kripke's a posteriori scientific necessities, which place far greater restrictions on the possibilies of what we seem to have conceived, in addition to the mere need for consistency. |
| 18726 | For each necessity in the world there is an arbitrary rule of language [Wittgenstein] |
| Full Idea: To a necessity in the world there corresponds an arbitrary rule in language. | |
| From: Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], B XIV.2) | |
| A reaction: This seems to be hardcore logical positivism, making all necessities arbitrary. Compare Quine on the number of planets. |