Combining Philosophers
Ideas for H.Putnam/P.Oppenheim, Ian McFetridge and Pierre Hadot
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7 ideas
10. Modality / A. Necessity / 6. Logical Necessity
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Logical necessity overrules all other necessities [McFetridge]
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The fundamental case of logical necessity is the valid conclusion of an inference [McFetridge, by Hale]
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In the McFetridge view, logical necessity means a consequent must be true if the antecedent is [McFetridge, by Hale]
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Traditionally, logical necessity is the strongest, and entails any other necessities [McFetridge]
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Logical necessity requires that a valid argument be necessary [McFetridge]
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It is only logical necessity if there is absolutely no sense in which it could be false [McFetridge]
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The mark of logical necessity is deduction from any suppositions whatever [McFetridge]
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