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3 ideas
6519 | Locke's solidity is not matter, because that is impenetrability and hardness combined [Robinson,H] |
17507 | Natural kind stereotypes are 'strong' (obvious, like tiger) or 'weak' (obscure, like molybdenum) [Putnam] |
11904 | Express natural kinds as a posteriori predicate connections, not as singular terms [Putnam, by Mackie,P] |