More people could name Harry Potter than Tony Blair. More people knew about the planet Kryptonite than Mercury. Moe, Larry and Curly are more popular than the 3 branches of government. I assume that adults were polled.
So there ya go. It would be fun to rename all the branches of government, the US judges, world leaders, planets, countries and such with names of fictional characters. And we were wondering why the American cable news stations could get away with spouting lies.