You believe that there is a book (or a computer screen) in front of you because it seems visually that way. I believe that I ate cereal for breakfast because I seem to remember eating it for breakfast. And we believe that torturing for fun is morally wrong and that 2+2=4 because those claims seem intuitively obvious. In each of these cases, it is natural to think that our beliefs are not only based on a seeming, but also that they are justifiably based on these seemings-at least assuming there is no relevant counterevidence.

These considerations have prompted many to endorse some version...