I see dumb people. They're everywhere. They don't know that they're dumb.

Have you ever noticed how incompetent people are often incredibly confident? Meanwhile, highly-skilled folks underestimate their ability to perform. That's called the Dunning-Kruger Effect named for Justin Kruger and David Dunning of Cornell University who published their study of the cognitive bias in a 1999 scientific paper. ABC Radio National's The Science Show recently explored the Dunning-Kruger Effect.

BoingBoing

Are you reading this Conroy? You are very confident that your filter will work. You have tech experts trying to explain this to you but you can't hear them over the roar of your incompetence.

ABC radio report:

NYTimes article from 2000

Overcoming bias