But the answer you get isn't necessarily the truth, because humans don't make decisions based on reason. 90% of the time, decision-making is based on emotion, a

But the answer you get isn't necessarily the truth, because humans don't make decisions based on reason. 90% of the time, decision-making is based on emotion, and the reasoning comes afterwards to try and justify why the decision was made. Thus, when you ask the person for justification, you're getting post-hoc reasons. There's a great book written on this - "The Righteous Mind: Why Good People Are Divided by Politics and Religion"