This perfectly describes my experience as a TA in graduate school. At first I didn't understand why my advisor insisted on being so precise in assignment instructions. Then when TAing with him I saw how students could creatively misinterpret instructions, even when I could not imagine how to make them more precise. An exception for the new case would be added to the next iteration of the assignments. I only understoo…
When I was a TA, I convinced my professor to stop giving graded assignments. it was obvious on tests who had done the assignments and who hadn't.
There are many other options for evaluating the students, but not many to force them to learn something.