Full Idea
According to the 'contrastivist' proposal knowledge is to be understood as essentially involving discrimination, such that knowing a proposition boils down to having the relevant discriminatory capacities.
Gist of Idea
Maybe knowledge just needs relevant discriminations among contrasting cases
Source
Duncan Pritchard (Epistemological Disjunctivism [2012], 2.§6)
Book Reference
Pritchard,Duncan: 'Epistemological Disjunctivism' [OUP 2012], p.89
A Reaction
Pritchard says this isn't enough, and we must also to be aware of supporting favouring evidence. I would focus on the concept of coherence, even for simple perceptual knowledge. If I see a hawk in England, that's fine. What if I 'see' a vulture?