Wikipedia on the Dunning-Kruger effect
A cognitive bias in which "people reach erroneous conclusions and make unfortunate choices but their incompetence robs them of the metacognitive ability to realize it". In other words, the dumber you are, the more likely you are to think you're smarter than everyone else; conversely, the truly smart ones tend to underestimate their own intelligence for fear of patronising others. The end result is a social climate where the likes of Fox News can thrive. Oy vey! #link