Emotion and Rationality

Here is a quote in regards to an error in the economic understanding of rationality.

The word "emotional" has overtones of irrationality, but actually emotion is at once a form of telescoped thinking (it is not irrational to step around an open manhole "instinctively" without first analyzing the costs and benefits of falling into it) and a prompt to action that often, as in the case of investment under uncertainty, cannot be based on complete or even good information and is therefore unavoidably a shot in the dark. We could not survive if we were afraid to act in the face of uncertainty. Richard A. Posner