Full Idea
A fundamental difficulty for epistemic externalist positions is that it is hard on this view to capture any adequate notion of epistemic responsibility.
Gist of Idea
Epistemic externalism struggles to capture the idea of epistemic responsibility
Source
Duncan Pritchard (Epistemological Disjunctivism [2012], Intro)
Book Reference
Pritchard,Duncan: 'Epistemological Disjunctivism' [OUP 2012], p.2
A Reaction
He never explains the 'responsibility', but I presume that would be like an expert witness in court, vouching for their knowledge.