You don’t need to be a nerd-like authority about the Titanic disaster or even know a few random facts about it, but to not even know it happened for real requires a stunning level of ignorance. It follows that the same people are clueless about ten thousand other things. A democracy can’t successfully function with a donkey-brained electorate. This helps to explain why Rick Santorum, Michelle Bachmann and Rick Perry had supporters. (Jim Romanesko posted this today.)