Essentially the author is saying that most people are honest most of the time. Maybe so, but truthfulness is only relevant in cases where there are stakes, and

Essentially the author is saying that most people are honest most of the time. Maybe so, but truthfulness is only relevant in cases where there are stakes, and in those cases, there is much, much more dishonesty. Put another way, I'd say strong evidence is all around us when it doesn't matter, but considerably scarcer when we are actually interested in the truth.