Combining Texts
Ideas for
'fragments/reports', 'Necessity and Non-Existence' and 'Conditionals'
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12 ideas
10. Modality / A. Necessity / 8. Transcendental Necessity
15064
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Proper necessary truths hold whatever the circumstances; transcendent truths regardless of circumstances [Fine,K]
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10. Modality / B. Possibility / 8. Conditionals / b. Types of conditional
14360
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Possible worlds for subjunctives (and dispositions), and no-truth for indicatives? [Jackson]
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10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals
14353
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Modus ponens requires that A→B is F when A is T and B is F [Jackson]
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14354
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When A and B have the same truth value, A→B is true, because A→A is a logical truth [Jackson]
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14355
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(A&B)→A is a logical truth, even if antecedent false and consequent true, so it is T if A is F and B is T [Jackson]
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10. Modality / B. Possibility / 8. Conditionals / d. Non-truthfunction conditionals
14358
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In the possible worlds account of conditionals, modus ponens and modus tollens are validated [Jackson]
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14359
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Only assertions have truth-values, and conditionals are not proper assertions [Jackson]
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14357
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Possible worlds account, unlike A⊃B, says nothing about when A is false [Jackson]
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10. Modality / B. Possibility / 8. Conditionals / f. Pragmatics of conditionals
14356
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We can't insist that A is relevant to B, as conditionals can express lack of relevance [Jackson]
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10. Modality / C. Sources of Modality / 6. Necessity from Essence
15070
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It is the nature of Socrates to be a man, so necessarily he is a man [Fine,K]
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10. Modality / E. Possible worlds / 2. Nature of Possible Worlds / a. Nature of possible worlds
15069
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Possible worlds may be more limited, to how things might actually turn out [Fine,K]
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15068
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The actual world is a totality of facts, so we also think of possible worlds as totalities [Fine,K]
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