My point is that everyone has a set of premises. Logically speaking, I think we should be aware we are making a leap when we assume that all of our own premises are correct and the other person's premises are incorrect. I mean there is no logical basis for the premises, they are just assumed by both parties. Even in the case where one set of premises is supposed to be based on science or rationality. They are still just broad assumptions.
(I get that acting on false information is not rational, I'm arguing that it is frequently the core of the irrationallity)