Cowen on "The limits of good vs. evil thinking":
Good vs. evil thinking causes us to lower our value of a person's opinion, or dismiss it altogether, if we find out that person has behaved badly. We no longer wish to affiliate with those people and furthermore we feel epistemically justified in dismissing them.
Sometimes this tendency will lead us to intellectual mistakes.
Tyler Cowen argues in a TED talk (~15 min) that stories pervade our mental lives. He thinks they are a major source of cognitive biases and, on the margin, we should be more suspicious of them - especially simple stories. Here's an interesting quote about the meta-level: