 Since he takes (a) and (b) to be true, Radford holds that belief is not necessary for knowledge. But either of (a) and (b) might be resisted. One might deny (a), arguing that Albert does have a tacit belief that (E), even though it’s not one that he thinks amounts to knowledge. David Rose and Jonathan Schaffer (2013) take this route. Alternatively, one might deny (b), arguing that Albert’s correct answer is not an expression of knowledge, perhaps because, given his subjective position, he does not have justification for believing (E). The justification condition is the topic of the next section.  