There was one year when I was a form teacher of a Sec 3 class, I wanted to nominate a girl for Excellent conduct grade. She was a very good student and I felt she really deserved the grade.
In that school, there was a rule that a student could only get "Excellent" if the teachers unanimously agreed.
In other words, if even one teacher disagreed, that student cannot be Excellent.
Just as I was thought the student was going to be ratified for "Excellent", a dissenting voice came out: "Her skirt is too short." And because of that that objection, the girl did not get excellent.
On paper, this was a perfectly "logical" ruling: those who get "Excellent' should be an "exemplary" student.
If I had wanted to, I could have gone through the list of every exemplary student and found an instance in which he or she fell short of the standards.
But I did not. I would never do such a thing. No one is perfect.