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'Natural Kinds and Biological Realism', 'Logic for Philosophy' and 'Significance of the Kripkean Nec A Posteriori'
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2 ideas
9. Objects / D. Essence of Objects / 7. Essence and Necessity / a. Essence as necessary properties
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Kripkean essential properties and relations are necessary, in all genuinely possible worlds [Soames]
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9. Objects / F. Identity among Objects / 7. Indiscernible Objects
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The identity of indiscernibles is necessarily true, if being a member of some set counts as a property [Sider]
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