Full Idea
There will be a legitimate notion of 'logical' necessity only if there is a notion of necessity which attaches to the claim, concerning a deductively valid argument, that if the premisses are true then so is the conclusion.
Gist of Idea
Logical necessity requires that a valid argument be necessary
Source
Ian McFetridge (Logical Necessity: Some Issues [1986], §1)
Book Reference
-: 'Aristotelian Society' [], p.136
A Reaction
He quotes Aristotle's Idea 11148 in support. Is this resting a stronger idea on a weaker one? Or is it the wrong way round? We endorse validity because we see the necessity; we don't endorse necessity because we see 'validity'.
Related Idea
Idea 11148 Deduction is when we suppose one thing, and another necessarily follows [Aristotle]