[Evbn]

There are almost always reason, but not always conscious rationality. Emotions in the limbic system are sort of like the analog machines of old, before digital logic computers, as a weak analogy.

What is often ignored is that rational decision making depends on priorities and estimations of prior probability, and these vary wildly based on circumstance.

[JoeAltmaier]

I'd like to agree; but the conclusion "Irrationality is observed; sometimes I find out its based on emotion: All irrationality is based on emotion" is not warrented. Its possible people make bad decisions because they're bad-decision-makers. Or maybe something else, I don't know.