Ironically, in today's marketplace successful nonfiction has to be unbelievable, while successful fiction must be believable.
Julian Assange, the WikiLeaks founder, has on several occasions talked about transparency as an absolute principle. I don't personally believe that.
But, I would say when I was four years old and I was at the Alan King Tennis Tournament and I was hitting with all the pros that would come to town. They would get me on the court or take notice and that stayed with me.