When Stupid People Don’t Know They’re Stupid

http://en.wikipedia.org/wiki/Dunning%E2%80%93Kruger_effect

http://www.nytimes.com/2000/01/18/health/among-the-inept-researchers-discover-ignorance-is-bliss.html?pagewanted=1

http://www.psychologytoday.com/blog/evolved-primate/201006/when-ignorance-begets-confidence-the-classic-dunning-kruger-effect