Oxford types have a solution for this problem, it's a pronoun called "one".

I find it slightly amusing in a situation where you are highly critical of polite euphemisms, that are generally well understood (chance of error is far below 1%), you make your point with imprecise language by using an ambiguous pronoun "you" rather than the unambiguous "one". In my experience people make this error with ambiguous pronouns at a far higher frequency than not-graded vs grade of zero.