Reasons, Justification, and Defeat

Traditionally, the notion of defeat has been central to epistemology, practical reasoning, and ethics. Within epistemology, it is standardly assumed that a subject who knows that p, or justifiably believes that p, can lose this knowledge or justified belief by acquiring a so-called ''defeater'', whether that is evidence that not-p, evidence that the process that produced her belief is unreliable, ...