Combining Texts

Ideas for 'fragments/reports', 'The Foundations of Mathematics (2nd ed)' and 'Lectures 1930-32 (student notes)'

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8. Modes of Existence / A. Relations / 4. Formal Relations / b. Equivalence relation

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An 'equivalence' relation is one which is reflexive, symmetric and transitive [Kunen]

8. Modes of Existence / D. Universals / 5. Universals as Concepts

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Using 'green' is a commitment to future usage of 'green' [Wittgenstein]