"A priori economics" e "a priori ethics"

"Whatever else they may disagree on, Friedman and Mises agree that an a priori ethics is impossible. Those who defend the possibility of a rationally justifiable ethics, Mises contends, are essentially claiming that moral knowledge is “imparted to man by an inner voice, i.e., by intuition,” and fail to recognise that “with regard to the interpretation of the inner voice … no method of peacefully settling … disagreements can be found.”53 The parallel between Mises’ criticism of a priori ethics and Friedman’s criticism of Mises’ own a priori economics is striking – ans should lead us to suspect that Mises has here fallen into Friedman’s own confusion between the private character of an “inner voice” and the public character of logic."

Realism and Abstraction in Economics: Aristotle and Mises versus Friedman, Roderick T. Long

Observação certeira e que faz justiça à posição de Rothbard-Hoppe que sendo Miseseanos, avançaram em novas "frentes".