4 ideas
19404 | Necessities rest on contradiction, and contingencies on sufficient reason [Leibniz] |
5692 | Introspection is not perception, because there are no extra qualities apart from the mental events themselves [Rosenthal] |
3448 | Do new ideas increase the weight of the brain? [Dance] |
19403 | Each of the infinite possible worlds has its own laws, and the individuals contain those laws [Leibniz] |