 Note that (B) is a belief about how the hat appears to you. So (B) is a belief about a perceptual experience of yours. According to the version of foundationalism just considered, a subject’s basic beliefs are introspective beliefs about the subject’s own mental states, of which perceptual experiences make up one subset. Other mental states about which a subject can have basic beliefs may include such things as having a headache, being tired, feeling pleasure, or having a desire for a cup of coffee. Beliefs about external objects cannot qualify as basic, according to this kind of foundationalism, for it is impossible for such beliefs to enjoy the kind of epistemic privilege necessary for being basic.