If You Can't Calculate Your Own Grade, You Should Fail

I think students who can't calculate their own grades should fail the course.

I'm not talking about a small flaw in addition here, but a complete inability to comprehend the way the grades add up, leading to a full-scale email war.

Corollary: Professors who don't put out a syllabus from which grades can be calculated so you know how you're doing lose tenure.