That's why it's an interesting test: I don't know the answer myself, so it's an exercise in learning with an unreliable teacher.

If a model ever DOES nail this I'll figure that out when I feel like I have a solid mental model, try to put that knowledge into action and it works.

Also Rust has great documentation compared to other languages, I particularly like this one for the quizzes to test your understanding: https://rust-book.cs.brown.edu/