Full Idea
Global supervenience seems too weak to capture the physical facts determining all the facts. …There could be two spatio-temporal regions alike in all physical respects, but different in some intrinsic non-physical respect.
Gist of Idea
Physicalism needs more than global supervenience on the physical
Source
Terence Horgan (From Supervenience to Superdupervenience [1993], §5)
Book Reference
-: 'Mind' [-], p.16
A Reaction
I.e. there might be two physically identical regions, but one contains angels and the other doesn't (so the extra fact isn't tracking the physical facts). Physicalism I take to be the simple denial of the angels. Supervenience is an explanandum.
Related Idea
Idea 16053 'Global' supervenience is facts tracking varying physical facts in every possible world [Horgan,T]