 The problem with the claim of self-evidence is that it is a conversation ender, not a starter. One who denies its self-evidence might think that those who hold to the principle are the ones who experience conceptual blindness. In contrast to analyticity, self-evidence holds in relation to the knowers themselves, and here intuitions vary, perhaps according to philosophical or other types of perspectives. Furthermore, if the principle truly is self-evident, it would be strange to respond to skeptics by attempting to give reasons to support that contention, and were such demanded, the request would itself invoke the very principle in question.