But there are things that do skew rather than cancel. So unless those are also accounted for, it is hard to trust it. There was a thing some time ago about how

But there are things that do skew rather than cancel. So unless those are also accounted for, it is hard to trust it. There was a thing some time ago about how a lot of phone polls are totally unreliable as a "cross section of the populous" because they really only capture the opinion of a certain set of people: Have a home phone. Are home during the day. Answer the phone from "Caller Unavailable". Does not immediately hang up on surveyor.