Do grad school students remember everything they were taught in college?

I studied at a university and not at a college, but I don't remember half of it.

But I think the core of this education is to get shit done without help. When I started I felt lost, because everyone was like "yeah... if you want to come to lecture do it, and if not don't, I don't care"

So I started and failed horribly.

The first year was a PITA, but eventually some students get it figured out and do their thing.