Hell, sometimes their parents argue about it. The best defence against this I suspect is to have a clearly communicated, unambiguous grading scheme, but this c

Hell, sometimes their parents argue about it. The best defence against this I suspect is to have a clearly communicated, unambiguous grading scheme, but this can be difficult to do in an even handed way. I had one undergrad prof whose policy was this: All incorrect answers get 0, no exceptions. Correct answers lose points for all steps not shown the way he had demonstrated. There wasn't a lot to argue about, but none of us felt his approach was entirely fair.