In college, I was taking this business class. I dont remember exactly what class it was. But we had an exam, and I think the grade I got back was a B. I was looking over the questions that I got wrong, and comparing them to the solution key provided by the professor. I disagreed with a few of the correct answers; in fact, I remember that the answers just didnt make sense, and my "incorrect answer" should have been right. This was the case on maybe 4 questions, which if I had gotten credit for, would have bumped me up to an A.
First I brought up my issue with the professor and argued that my answers were right, etc. I thought there was no way I would not get the points for the questions based on my argument.
The professor simply stated that these were the "book's solutions", and if that's what they thought were right, then it was right.
I was furious, and I remember ripping her a new one. I said something along the lines of her being the professor of the class and how we all (students) assume she has some influence over the course rather than a textbook.
A week later, she decided to give me the credit.