At one company we were reviewing the interview questions we used for graduates, and we had to take one out about a hypothetical factory manufacturing widgets. It was actually a simple maths problem about widgets per hour given various inputs. But the grads would freak out at the word "widget" and derail the interview demanding an explanation of what exactly a widget was, what it was used for, etc etc. I personally thought that that was an excellent filter actually, but I was overruled...