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Ideas for 'Lectures 1930-32 (student notes)', 'fragments/reports' and 'Logical Necessity: Some Issues'

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3 ideas

10. Modality / C. Sources of Modality / 1. Sources of Necessity

12187

Objectual modal realists believe in possible worlds; non-objectual ones rest it on the actual world [McFetridge]

10. Modality / C. Sources of Modality / 3. Necessity by Convention

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For each necessity in the world there is an arbitrary rule of language [Wittgenstein]

10. Modality / C. Sources of Modality / 5. Modality from Actuality

12186

Modal realists hold that necessities and possibilities are part of the totality of facts [McFetridge]