Single Idea 9449

[catalogued under 4. Formal Logic / D. Modal Logic ML / 7. Barcan Formula]

Full Idea

Modality in the actual world is the import of the Barcan formula, and there are good reasons for accepting the Barcan formula.

Gist of Idea

The plausible Barcan formula implies modality in the actual world

Source

Alexander Bird (Nature's Metaphysics [2007], 1.2)

Book Reference

Bird,Alexander: 'Nature's Metaphysics' [OUP 2007], p.6


A Reaction

If you thought logic was irrelevant to metaphysics, this should make you think twice.