The Efficient Market Hypothesis famously assumes that investors are "rational." It's been widely ridiculed as unrealistic, because investors are human, and wont to irrational action. Perhaps one shouldn't assume that rationalists are rational; a more, shall I say, reasoned approach would be to evaluate those espousing Rationalism on the (little-r) rationality of their words and actions. Though, there are those who would be offended by one's findings, yea or nay.
