Single Idea 19033

[catalogued under 4. Formal Logic / D. Modal Logic ML / 3. Modal Logic Systems / c. System D]

Full Idea

Deontic modality can be divided into sentence-modifying 'ought-to-be' modals, and predicate-modifying 'ought-to-do' modals.

Gist of Idea

Deontic modalities are 'ought-to-be', for sentences, and 'ought-to-do' for predicates


Barbara Vetter (Potentiality [2015], 6.9.2)

Book Reference

Vetter,Barbara: 'Potentiality: from Dispositions to Modality' [OUP 2015], p.239

A Reaction

[She cites Brennan 1993] These two seem to correspond to what is 'good' (ought to be), and what is 'right' (ought to do). Since I like that distinction, I also like this one.