Full Idea
Logical supervenience, restricted to individuals, seems to imply strong reduction. It is said that where the B-facts logically supervene on the A-facts, the B-facts simply re-describe what the A-facts describe, and the B-facts come along 'for free'.
Gist of Idea
If some facts 'logically supervene' on some others, they just redescribe them, adding nothing
Source
Lynch,MP/Glasgow,JM (The Impossibility of Superdupervenience [2003], C)
Book Reference
-: 'Philosophical Studies' [-], p.213
A Reaction
This seems to be taking 'logically' to mean 'analytically'. Presumably an entailment is logically supervenient on its premisses, and may therefore be very revealing, even if some people think such things are analytic.