Ideas from 'Logical Necessity: Some Issues' by Ian McFetridge [1986], by Theme Structure

[found in 'Logical Necessity' by McFetridge,Ian G. [Aristotelian Soc 1990,0-907111-24-6]].

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10. Modality / A. Necessity / 6. Logical Necessity

12184

Logical necessity overrules all other necessities

15083

The fundamental case of logical necessity is the valid conclusion of an inference [Hale]

15084

In the McFetridge view, logical necessity means a consequent must be true if the antecedent is [Hale]

12180

Logical necessity requires that a valid argument be necessary

12181

Traditionally, logical necessity is the strongest, and entails any other necessities

12183

It is only logical necessity if there is absolutely no sense in which it could be false

12192

The mark of logical necessity is deduction from any suppositions whatever

10. Modality / B. Possibility / 2. Epistemic possibility

12182

We assert epistemic possibility without commitment to logical possibility

10. Modality / C. Sources of Modality / 1. Sources of Necessity

12187

Objectual modal realists believe in possible worlds; non-objectual ones rest it on the actual world

10. Modality / C. Sources of Modality / 5. Modality from Actuality

12186

Modal realists hold that necessities and possibilities are part of the totality of facts