According to school professors, the only way to prove that a person knows something is to lock them in a room for an hour or two and have them write down the entire thing on a piece of paper while being watched intently.
I think the difference is that the teacher already has the full knowledge and learning isn’t as easy as telling a secret once and then the learner can quickly parse it and keep it forever.
Despite that, I’d also prefer to proof I know a topic by writing an essay at home rather than under pressure within an hour under supervision.
These were not the proofs they were looking for.