 When a customer who doesn't know what they're talking about, there are some that do know what they're talking about, okay? But most of the time, when you have a customer who's trying to tell you how to do it, when you know it's wrong, rather than argue with them and try to win the argument, because if you do, that'll come back to haunt you. So here's what happens. If they think they know better, don't do the job.