 There are well-known examples that count against the idea that reliably produced true belief is sufficient for knowledge. Let Truenorth be a person who has true beliefs about what direction is north, south, etc., even when blindfolded. He has a kind of internal compass like the ones found in migratory birds. But assume that Truenorth has no reason to think that his beliefs about compass directions are accurate; he has never received confirmation of their accuracy, neither from the testimony of others nor by checking things out himself. Nevertheless, he is confident that his beliefs about what direction is north, etc., are correct. Assume, also, that he has no reason to think that others in his society have, nor that they lack, his directional ability. In general, assume that there are no undefeated defeaters of Truenorth’s beliefs about what direction is north, etc. Intuitively, it seems that if he believes that some direction he points to is north, he is not justified in believing, nor does he know, that it is north, even if what he believes regarding compass directions is always true.