I knew that the human mind is not as biologically inclined to be rational as it is to survive. That even when faced with clear evidence to the contrary, if a person’s belief system (say that black people are evil race baiting crybaby animals) is rooted in their identity, any challenge to their opinion feels like a threat to their very lives. An ancient and impenetrable aggression takes over that can not be reasoned with, only shut out or ignored.