On our recent conversations about opt-in polls ....
An alarming poll last December suggested Holocaust denial was widespread. Pew research followed it up with questions like, "Are you licensed to drive a nuclear submarine?" (Answer: No one is). The answer: 12% of certain edit: self reported to be (but suspected not really to be) demographics say yes. And that demographic matched up with those that polled as Holocaust deniers.
They conclude that (big surprise?) we need to be careful when interpreting the results of opt-in polls.
