Predictably / Irrational

Predictably / Irrational: "And yet, even the Oracle of Omaha is not immune to the allure of irrational behavior. He is what Behavioral Economists call a sophisticate: someone who understands his irrationality and builds systems to cope with it. (The other types of people are the “rational,” who never deviates from optimal behavior, and the “naif,” who is unaware of his irrationality and therefore doesn’t do anything to address it.)

Uncommon a person as he was, Buffett had a very common concern: he feared gaining too much weight. Rational agents don’t gain weight because they always consider all the possible consequences of all actions. Naifs plan to start their diet tomorrow."