Friedman believed that the practitioners of praxeology were incapable of engaging in productive and open interchange with their colleagues. He told an interviewer that in admitting "no role whatsoever for empirical evidence," its practitioners developed "an attitude of human intolerance." He repeatedly stressed that his goal was to maintain "humility": to practice a mode of economic reasoning that avoided any claims to absolute truth or certainty, and that provided an objective basis for settling differences of opinion.

Angus Burgin, The Great Persuasion, loc. 409