 It’s plausible to suppose that people have some sort of privileged access to at least some of their own mental states or processes: You know about your own mind, or at least some aspects of it, in a different way and better than you know about other people’s minds, and maybe also in a different way and better than you know about the outside world. Consider pain. It seems you know your own pains differently and better than you know mine, differently and (perhaps) better than you know about the coffee cup in your hand. If so, perhaps that special “first-person” privileged knowledge arises through something like introspection, in one or more of the senses described in Section 2 above.