[avmich]

I have a friend who's into alternative history and conspiracy theories. Our discussions so far come to the point of how hard it is to have an objective criteria for correctness. Right now many people can choose beliefs and afford to stick to them even if they aren't supported by reality - because that doesn't affect them much.

In a way, my answer to your question is "it depends". For somebody with "good enough" criteria of correctness I can provide examples.