Sean Carroll, Epistemologist
By day he’s a physicist at Caltech, but Sean’s posts at Cosmic Variance include some of the clearest and most level-headed discussion of epistemology to be found anywhere (regardless of academic department).
In a recent post, he carefully explains why it is unreasonable, in light of our best physical theories, to believe in telekinesis and other parapsychological phenomena.
If you haven’t already seen it, make sure to read Sean’s essay on What I Believe But Cannot Prove, which is a broad discussion of logic, observational evidence, proof, and the limits of our knowledge.
I’m also very impressed by the clarity with which he writes. I feel like I know more about particle physics now after reading a few short paragraphs by him on the physics of a spoon than I learned from months of reading Scientific American articles on the subject =).