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Ideas for 'On the Question of Absolute Undecidability', 'In a Different Voice' and 'The Principles of Mathematics'

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2 ideas

9. Objects / F. Identity among Objects / 7. Indiscernible Objects

14107

Terms are identical if they belong to all the same classes [Russell]

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It at least makes sense to say two objects have all their properties in common [Wittgenstein on Russell]