“Kahan’s argument about the woman who does not believe in global warming is a surprising and persuasive example of a general principle: if we want to understand others, we can always ask what is making their behaviour ‘rational’ from their point of view. If, on the other hand, we just assume they are irrational, no further conversation can take place.”
http://aeon.co/magazine/psychology/we-are-more-rational-than-those-who-nudge-us/