The asset pricing model--and this is critical-- assumes everyone is rational and holds the tangency portfolio.

资本资产定价模型是非常重要的模型-,假设每人是理性的，并持有切线资产组合。

耶鲁公开课 - 金融市场课程节选

However, this body of work is best understood as a set of exceptions that modifies but leaves intact the canonical model of rational choice, not least since it is irrational to suppose that people in general behave irrationally.

ECONOMIST: Can you be too rich?

In the real world, we rarely encounter a situation that can be completely modeled with an analytical (rational) model, so the correct answer to the model cannot purport to be the definitively correct answer to the real world situation.

FORBES: Meeting the Big Data challenge: DON'T be objective

It challenges our traditional reliance on a model of human behavior that presupposes a rational person capable of being deterred by the threat of punishment.

NPR: Rules Should Govern Torture, Dershowitz Says