Until Hurricane Sandy, the political media derided anyone who said global warming was fueling extreme weather as an environmental activist who was overstating science to make his case. Then Sandy came, and the media acted like no one could have seen it coming.
Today, the pundits all insist the presidential race is a toss-up and Nate Silver is a moron for saying otherwise. Tuesday night, they'll all insist no one could possibly have predicted Barack Obama would decisively win the Electoral College.
In fortune-telling business, it's important to insist that only you are allowed to look into the magic crystal ball and see the future. Otherwise the rube forking over $5 for a phony fortune might be able to tell you're a huckster with a glass toy and maybe they'd be better off controlling their own destiny.