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Ideas for 'fragments/reports', 'Introduction - Ontology' and 'The Nature and Communication of Substance'

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9. Objects / F. Identity among Objects / 6. Identity between Objects

5494	'Lightning is electric discharge' and 'Phosphorus is Venus' are synthetic a posteriori identities [Lycan]
	Full Idea: There is such a thing as synthetic and a posteriori identity that is nonetheless genuine identity, as in lightning being electrical discharge, and the Morning Star being Venus.
	From: William Lycan (Introduction - Ontology [1999], p.5)
	A reaction: It is important to note that although these identities are synthetic a posteriori, that doesn't make them contingent. The early identity theorists like Smart seemed to think that it did. Kripke must be right that they are necessary identities.