Or "garbage in, garbage out"? But that's really about computers. And maybe it is name calling. Is there no standard name for this? Or not in English? Maybe it'

Or "garbage in, garbage out"? But that's really about computers. And maybe it is name calling. Is there no standard name for this? Or not in English? Maybe it's similar to the "Good Student" picture. Bright within a given assignment, but taking the assignment to be immutable, or taking no interest in where the assignment comes from. Or I've heard a saying "nobody will pay you to solve problems that they've already defined clearly."