[sho_hn]

> I think you can genuinely believe that you know something until you are called out on it, only to realise that you can't even explain it.

When I was a young boy, my mom always used to tell me that the true benchmark of whether you understand something is whether you can explain it to someone else. It's a great self-checking habit to form indeed, because relating knowledge forces one to organize it and whittle it down to essentials, and often new insights spring forth in the process. So I really frequently grab someone blessed with curiosity and just talk at them about what I'm doing.

Good old mom wisdom.