Steven Johnson: Most of us cheat just a little bit but we rationalize it by saying that I'm mostly a good person and this is an acceptable level of it. So to me the interesting question is why does one cheat or not cheat in a given circumstance? He says there are a lot of reasons so we wrote a bit in our first and second free economics books about different kinds of cheating.Johnson: The motivation behind dishonesty really is that we can give ourselves a little edge and create a narrative where we're not such a bad guy.