At the level of belief, there are two main kinds of explanation. The first, much more popular one, agrees with those at the level of assertion that contradiction is at the heart of the absurdity. The contradiction is revealed in various ways, some using the resources of doxastic logic (e.g. Hintikka), others (e.g. Sorensen) principles of rational belief maintenance and formation, while still others appeal to our putative capacity for self-knowledge and the first-person authority (e.g. Shoemaker) we have over our states of mind.