Combining Texts
Ideas for
'On the Philosophy of Logic', 'Meaning and Reference' and 'Introduction to the Theory of Logic'
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5 ideas
10. Modality / B. Possibility / 1. Possibility
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We can't explain 'possibility' in terms of 'possible' worlds [Fisher]
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10. Modality / B. Possibility / 8. Conditionals / c. Truth-function conditionals
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If all truths are implied by a falsehood, then not-p might imply both q and not-q [Fisher]
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10. Modality / B. Possibility / 8. Conditionals / d. Non-truthfunction conditionals
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In relevance logic, conditionals help information to flow from antecedent to consequent [Fisher]
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10. Modality / D. Knowledge of Modality / 1. A Priori Necessary
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A statement can be metaphysically necessary and epistemologically contingent [Putnam]
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10. Modality / D. Knowledge of Modality / 4. Conceivable as Possible / a. Conceivable as possible
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Conceivability is no proof of possibility [Putnam]
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