Over on Hacker News mechanical_fish explains science

I don't believe anything which hasn't been replicated by a skeptic, because people are too trusting and hopeful and are blind to their own mistakes. Frankly, your equipment is probably broken and your students are probably ignorant; I only trust myself. And, come to think of it, I don't even trust me very much -- I should convince my skeptics to replicate my results so that I can believe me.