The better idiot screen on any discussion forum with a well defined subject scope would be a factual knowledge test. But the factual knowledge test wouldn't maintain the existing community if the existing community already has "hivemind" about factual issues central to the forum's subject, contrary to fact. I wonder what we would all consider the subject scope of HN? Are there any issues on which the HN consensus about the facts of the real world might be contrary to "objective" fact?
