 Recall that the justification condition is introduced to ensure that S’s belief is not true merely because of luck. But what must justification be, if it can ensure that? It may be thought that S’s belief that p is true not merely because of luck when it is reasonable or rational, from S’s own point of view, to take p to be true. Or it may be thought that S’s belief is true not merely because of luck if that belief has a high objective probability of truth, that is, if it is formed or sustained by reliable cognitive processes or faculties. But, as we will see in the next section, if justification is understood in either of these ways, it cannot ensure against luck.