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Ideas for 'Commentary on 'De Anima'', 'The Trouble with Possible Worlds' and 'Frege philosophy of mathematics'

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2 ideas

9. Objects / F. Identity among Objects / 2. Defining Identity

9848	Content is replaceable if identical, so replaceability can't define identity [Dummett, by Dummett]

9842	Frege introduced criteria for identity, but thought defining identity was circular [Dummett]