 Rather than attempt to accommodate fallible foundations, McGrew follows early classical foundationalists in arguing that infallibility or infallible justification (what he calls “incorrigibility”) is in fact required for foundational justification. Some worry, however, that such foundations, even if they are generally available, are too “thin”: that I am “experiencing this” doesn’t seem to convey anything about what sort of experience I am having, and it is difficult to see how we could get from here to justified beliefs that involve categorizing or conceptualizing our experiences in more informative ways (see, e.g., Sosa 2003).