your college Prof a 'Dr.' or just 'Mr.'?
when I was in college, if our professors had earned their doctorates, they were addressed as "Dr." for respect- one of my teachers was the Dean of Students so in class he was addressed as "Dean Smith".....
the sister says her brother has a Ph.D., but in class, when the girl asks a question, she says "Mr. Savage"- what did you call your professors (to their face) in class?