Everything we hear is an opinion, not a fact. Everything we see is a perspective, not the truth. — Marcus Aurelius Today I want to talk about one of the most interesting things about humans, the fact that we cling so dearly to our belief systems in face of contradiction evidence, often to our own detriment. Why do humans resist changing their minds, even in the face of overwhelming evidence? How often have you changed your opinions when presented with new facts? How often have you actually changed your behavior when you learned new information? How often to you rationalize your opinion or simply deny facts because they don’t fit your belief system?