[Proud90sKid]

I am starting grad school and am very confused about the grading. I have always heard the same seemingly contradictory thing said in almost the same sentence , " a C is failure, even a B- can get you a warning.....but in grad school , grades aren't important". I also hear that the C is the lowest you can get. So is the grading scale usually "80 or below is a C"? I can still get a C with a 0 percent average? Or is it that everyone is so qualified that nobody will get below a C?

Also why is everyone saying that nobody cares about grades in grad school- If a B- can get you a stern talking to - it sounds like grades matter a hell of a lot; much more than undergrad where many people consider B a good grade. I'm very confused about why this is said - if schools consider anything less than an "A" as poor performance/barely passing.