Full Idea
If someone consistently prophesied the winners of horse races, it appears that this man knows who will win the races, but surely he does not have justified beliefs as to who will win?
Gist of Idea
Consistent accurate prediction looks like knowledge without justified belief
Source
Robert Audi (Epistemology: contemporary introduction [1998], VIII p.229)
Book Reference
Audi,Robert: 'Epistemology: a contemporary introduction' [Routledge 1998], p.229
A Reaction
This is where internalists and externalists (notably reliabilists) sharply part company. IF a reliable clairvoyant appeared, we would eventually accept them as a knower. But they DON'T appear, because knowledge needs justification!