Full Idea
Everyone agrees that reduction requires supervenience, …but the more interesting issue is whether supervenience suffices for reduction.
Gist of Idea
Reduction requires supervenience, but does supervenience suffice for reduction?
Source
Karen Bennett (Supervenience [2011], §3.3)
Book Reference
'Stanford Online Encyclopaedia of Philosophy', ed/tr. Stanford University [plato.stanford.edu], p.8
A Reaction
I think we should assume that there is a reason for every genuine case of supervenience (i.e. there are no cases of eternal or ubiquitious coincidence). One-way causation seems to give supervenience without reduction.