Full Idea
There are no strict psychophysical laws (that is, laws connecting mental events under their mental descriptions with physical events under their physical descriptions).
Clarification
'Strict' laws allow no exceptions
Gist of Idea
There are no strict psychophysical laws connecting mental and physical events
Source
Donald Davidson (Davidson on himself [1994], p.231)
Book Reference
'A Companion to the Philosophy of Mind', ed/tr. Guttenplan,Samuel [Blackwell 1995], p.231
A Reaction
This is clearly open to question. It may be just that no human mind could ever grasp such laws, given their probable complexity.