one of the problems of experts is that at the edge of their field of expertise, they aren't experts of the edge. It's just they have developed expertise in the

one of the problems of experts is that at the edge of their field of expertise, they aren't experts of the edge. It's just they have developed expertise in the building blocks to allow them to live at the edge. Quite often we are interested in things happening at the edge, and the "experts' can't really provide information at high levels of certainty.