[datadrivenangel]

I did once have a Physics lecturer say " When I took Quantum Mechanics back in my undergrad, I got an A but didn't actually understand anything" and then in the same lecture 20 minutes later: "What part of this do you not understand?" when the entire class was just blankly looking at the whiteboard.

[SoftTalker]

At least at the undergrad level, it's not impossible to get an "A" without actually learning anything. Especially Freshman/Sophomore level classes. You just cram for the exams and regurgitate what you memorized. Within a few months time it's mostly gone.

[stackedinserter]

Seriously, what so non-understandable in first 20 minutes of QM?

[brookst]

Probably depends on how it’s explained, no?

I could make arithmetic incomprehensible, let alone QM.

[vonneumannstan]

They never implied it was the first 20 minutes of the entire course

[datadrivenangel]

This was about halfway through the semester.