In an npr interview Dan Airley discusses his new book, The (Honest) Truth About Dishonesty.   Ariely describes these experiments and the results in a new book, The (Honest) Truth About Dishonesty: How We Lie To Everyone — Especially Ourselves. He talks with NPR's Robert Siegel about how society's troubles aren't always caused by the really bad apples; they're caused by the scores of slightly rott…