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Single Idea 15088

[filed under theme 10. Modality / A. Necessity / 6. Logical Necessity ]

Full Idea

The logical necessities can be taken to be the propositions which are true in virtue of the nature of all logical concepts.

Gist of Idea

Logical necessities are true in virtue of the nature of all logical concepts

Source

Bob Hale (Absolute Necessities [1996], p.10)

Book Ref

-: 'Philosophical Perspectives' [-], p.10


A Reaction

This is part of his story of essences giving rise to necessities. His proposal sounds narrow, but logical concepts may have the highest degree of generality which it is possible to have. It must be how the concepts connect that causes the necessities.

Related Idea

Idea 15087 Conceptual necessities are made true by all concepts [Hale]


The 8 ideas from 'Absolute Necessities'

Maybe not-p is logically possible, but p is metaphysically necessary, so the latter is not absolute [Hale]
A strong necessity entails a weaker one, but not conversely; possibilities go the other way [Hale]
'Relative' necessity is just a logical consequence of some statements ('strong' if they are all true) [Hale]
Metaphysical necessity says there is no possibility of falsehood [Hale]
'Broadly' logical necessities are derived (in a structure) entirely from the concepts [Hale]
Absolute necessity might be achievable either logically or metaphysically [Hale]
Logical necessities are true in virtue of the nature of all logical concepts [Hale]
Conceptual necessities are made true by all concepts [Hale]