“… the obvious can be very difficult for people to see. That is because people are self-corrective systems. They are self-corrective against disturbance, and if the obvious is not of a kind that they can easily assimilate without internal disturbance, their self-corrective mechanisms work to sidetrack it, to hide it, even to the extent of shutting the eyes if necessary, ro shutting off various parts of the process of perception.” – Gregory Bateson, 1968