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3 ideas
7931 | If a substance is just a thing that has properties, it seems to be a characterless non-entity [Leibniz, by Macdonald,C] |
17554 | There must be some internal difference between any two beings in nature [Leibniz] |
5746 | The Identity of Indiscernibles is contentious for qualities, and trivial for non-qualities [Melia] |