Combining Philosophers

Ideas for William Paley, Ian McFetridge and James Cargile

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7 ideas

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