Full Idea
The Favouring Principle says that if S knows two things, and that the first entails the second, then S has better evidence in support of her belief in the first than she has for denying the second.
Gist of Idea
Favouring: an entailment will give better support for the first belief than reason to deny the second
Source
Duncan Pritchard (Epistemological Disjunctivism [2012], 2.§3)
Book Reference
Pritchard,Duncan: 'Epistemological Disjunctivism' [OUP 2012], p.76
A Reaction
[his version is full of Greek letters, but who wants that stuff?] Pritchard concludes that if you believe in the closure principle then you should deny the favouring principle.