Full Idea
It seems best to take fallible reasons as the basic notion of fallibilism. So fallible knowers are agents who know what they know on the basis of fallible reasons. Fallible knowledge will be knowledge on basis of fallible reasons.
Gist of Idea
It is best to see the fallibility in the reasons, rather than in the agents or the knowledge
Source
Trent Dougherty (Fallibilism [2011], 'Cognates')
Book Reference
'Routledge Companion to Epistemology', ed/tr. Bernecker,S/Pritchard,D [Routledge 2014], p.132
A Reaction
This is because an ideal knower would be compelled by the evidence, so if fallibilism is universal it must reside in the evidence and not in the knower (bottom p.131).