We're generally intelligent people...so why do we do such dumb things?
One of the best ways to explain our counterproductive behavior is the Ladder of Inference. This elegant model was first developed by Chris Argyris, building on the work of S.I. Hayakawa and Alford Korzybski, and articulated further by William Isaacs and Rick Ross.
Start at the bottom and work your way up.
Via Kenneth Mikkelsen