Rereading Greg Mankiw’s “The Macroeconomist as Scientist and Engineer” I came across this Bob Solow quote on why he doesn’t bother to seriously engage neoclassical economists:

Suppose someone sits down where you are sitting right now and announces to me that he is Napoleon Bonaparte. The last thing I want to do with him is to get involved in a technical discussion of cavalry tactics at the Battle of Austerlitz. If I do that, I’m getting tacitly drawn into the game that he is Napoleon Bonaparte.