Dershowitz explains how people pass courses and get degrees without studying.
https://www.youtube.com/watch?v=Auvd9daACGg
Starting at 2:50... we’ve abolished grades and nobody fails anymore.
He's wrong about that. College students still receive "F" grades. Usually, when they know they're going to fail, they'll drop or withdraw from a class. There are still students with an occasional "F" on their transcripts.
Unless he's talking about certain colleges - maybe the Ivies? I don't know. But the other colleges will fail you.