Full Idea
The argument for supervenience rests on the principle that any mental difference must be capable of showing itself in differential physical consequences.
Gist of Idea
Supervenience requires all mental events to have physical effects
Source
David Papineau (Philosophical Naturalism [1993], 1.8)
Book Reference
Papineau,David: 'Philosophical Naturalism' [Blackwell 1993], p.28
A Reaction
With our current knowledge of the brain, to assume anything less than this sort of correlation would be crazy.