Combining Texts
Ideas for
'fragments/reports', 'Modal Logic within Counterfactual Logic' and 'Go Figure: a Path through Fictionalism'
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5 ideas
10. Modality / A. Necessity / 1. Types of Modality
14625
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Necessity is counterfactually implied by its negation; possibility does not counterfactually imply its negation [Williamson]
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10. Modality / B. Possibility / 8. Conditionals / a. Conditionals
14623
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Strict conditionals imply counterfactual conditionals: □(A⊃B)⊃(A□→B) [Williamson]
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10. Modality / B. Possibility / 9. Counterfactuals
14624
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Counterfactual conditionals transmit possibility: (A□→B)⊃(◊A⊃◊B) [Williamson]
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10. Modality / C. Sources of Modality / 1. Sources of Necessity
14531
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Rather than define counterfactuals using necessity, maybe necessity is a special case of counterfactuals [Williamson, by Hale/Hoffmann,A]
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10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / b. Worlds as fictions
19493
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Governing possible worlds theory is the fiction that if something is possible, it happens in a world [Yablo]
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