- If there are brute facts, then there is at least one fact x that is brute (i.e. unexplained and inexplicable).
- Fact x is brute only if there is no sufficient condition for it obtaining.
- There being no sufficient condition for the obtaining of x is a sufficient condition for the obtaining of x.
- Therefore, x is both brute and not brute. [from 2 and 3]
- Contradictory facts do not exist.
- Therefore, there are no brute facts. [conclusion, from 1-5]