more from Michael Jubien

Single Idea 13394

[catalogued under 10. Modality / A. Necessity / 6. Logical Necessity]

Full Idea

Typically philosophers say that for P to entail Q is for the proposition that all P's are Q's to be necessary. I think this analysis is backwards, and that necessity rests on entailment, not vice versa.

Gist of Idea

Entailment does not result from mutual necessity; mutual necessity ensures entailment


Michael Jubien (Possibility [2009], 4.4)

Book Reference

Jubien,Michael: 'Possibility' [OUP 2009], p.92

A Reaction

His example is that being a horse and being an animal are such that one entails the other. In other words, necessities arise out of property relations (which for Jubien are necessary because the properties are platonically timeless). Wrong.