I first present a brief interpretation of Sosa’s virtue epistemology by showing how it is arguably better than Goldman’s process reliabilism, why Sosa distinguishes between animal knowledge and reflective knowledge, and how Sosa’s recent account of knowing full well can deal with pragmatic encroachment. Then, I raise two worries about Sosa’s account: (a) Sosa’s claim that one might have animal knowledge without knowing reflectively or knowing full well implies that one’s true belief might manifest both competence and luck, which seems (...) to pose a challenge to Sosa’s solution to the Gettier problem; (b) intellectual virtue or competence does not seem to be a necessary condition for knowledge: there are cases where one knows without possessing the relevant intellectual virtue or competence. Finally, I suggest a responsibilist account of knowledge and show how it can not only handle the cases that pose a problem for Sosa’s account but also explain our intuitions about different grades of knowledge. (shrink)