Quote Originally Posted by a500lbgorilla View Post
We already hit this. This is circular, tautological, unfalsiable. You believe because you believe it. I don't believe it because of the wealth of evidence that comes from the behavioral economics side of things that puts people in situations where rational is very well defined and they don't behave that way.

Jackvance brought it up some time back and I'm glad someone else is aware that people just aren't rational in the least.
The foundations of every science is tautology and assumption.

Just like every science on the face of the planet, economics starts with a handful of unfalsifiable assumptions, and then works in the falsifiable in all the details. You are using "rational" in a non-economic sense, using this straw man to argue against rational choice theory.

Your line about JV says it all. Economists do not call the irrationality of behavior rational. Economists establish the assumption of rationality and what it means, and then work everything else imaginable in. Every science does this, without exception.