Ideas from 'Absolute Necessities' by Bob Hale [1996], by Theme Structure

[found in 'Philosophical Perspectives' (ed/tr -) [- ,]].

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10. Modality / A. Necessity / 2. Nature of Necessity
Absolute necessity might be achievable either logically or metaphysically
10. Modality / A. Necessity / 3. Types of Necessity
Maybe not-p is logically possible, but p is metaphysically necessary, so the latter is not absolute
'Relative' necessity is just a logical consequence of some statements ('strong' if they are all true)
A strong necessity entails a weaker one, but not conversely; possibilities go the other way
10. Modality / A. Necessity / 5. Metaphysical Necessity
Metaphysical necessity says there is no possibility of falsehood
10. Modality / A. Necessity / 6. Logical Necessity
Logical necessities are true in virtue of the nature of all logical concepts
'Broadly' logical necessities are derived (in a structure) entirely from the concepts
In the McFetridge view, logical necessity means a consequent must be true if the antecedent is
10. Modality / C. Sources of Modality / 4. Necessity from Concepts
Conceptual necessities are made true by all concepts