 Focusing on reliability, rather than rationality, has advantages and disadvantages. An important advantage is that this approach allows us to accommodate cases like the unmarked clock, discussed in the previous section. But the disadvantage is that reliability-based level-bridging principles do not answer certain questions which, for many epistemologists, lie at the heart of the higher-order evidence debate: can epistemic akrasia be rational? And should we in some sense treat rationality as an expert to which we should defer? If our level-bridging principle does not mention rationality, it will not have immediate consequences for these questions, which may seem unsatisfying to some.