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Full Idea
McFetridge's conception of logical necessity is one which sees the concept as receiving its fundamental exemplification in the connection between the premiss and conclusion of a deductively valid inference.
Gist of Idea
The fundamental case of logical necessity is the valid conclusion of an inference
Source
report of Ian McFetridge (Logical Necessity: Some Issues [1986]) by Bob Hale - Absolute Necessities 2
Book Ref
-: 'Philosophical Perspectives' [-], p.96
A Reaction
This would mean that p could be logically necessary but false (if it was a valid argument from false premisses). What if it was a valid inference in a dodgy logical system (including 'tonk', for example)?