it’s conservative economists who insist that people are always rational and utility-maximizing; liberal economists are the ones willing to invoke bounded rationality, animal spirits, etc.. The whole salt-water fresh-water split was about which you were going to believe: the assumption of perfect maximization, or your own lying eyes. And the Keynesians were the ones who preferred to believe their eyes.

From A Mechanical Manifesto -

Take away quote of the day.