This just seems like a tautology, as--from your description--it sounds like this is what I'd call a "q&a session", and so it may as well have become a "doubt clearing/solving session" because the teachers/instructors themselves also/already were taught that terminology... I'm wondering where it started, as, in English, the word "doubt" frankly almost never comes up, and if someone simply didn't learn it, they'd be fine?