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Ideas for 'fragments/reports', 'Introduction to Russell's Theory of Types' and 'Lectures 1930-32 (student notes)'

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10. Modality / C. Sources of Modality / 3. Necessity by Convention
For each necessity in the world there is an arbitrary rule of language [Wittgenstein]
     Full Idea: To a necessity in the world there corresponds an arbitrary rule in language.
     From: Ludwig Wittgenstein (Lectures 1930-32 (student notes) [1931], B XIV.2)
     A reaction: This seems to be hardcore logical positivism, making all necessities arbitrary. Compare Quine on the number of planets.