Suppose an orthodox economist hands you a map and says, "This is a map of New York City." You look at it and say, "It is not. It is a map of the London tube system."
Or suppose an orthodox economist hands you a map. And you look at it and say, "This cannot be right. Here are two interesecting contour lines supposedly of different elevations."
Suppose the orthodox economist responds, "Assumptions do not need to be realistic."
I have encountered several economists who distract from those pointing out the logical inconsistencies and factual errors in their theories. They make dismissive non sequiturs about methodology, as illustrated in the parables above.
6 months ago