+1 to everything @DumbHollywoodActor just wrote. I would quote him but I'd end up just copying everything he wrote since it is all on point. We definitely work to help manage people's expectations because most people think it is a simple and ...
I would erase how I formed my reasoning on the paper and watch explanation. If necessary, I will cut this question and pasted it on my notebook. I will do them again and again until my notebook gets lighter and lighter.