"One of the things unique to the human brain is this need to explain why events occur"

This quote comes from Mike Gazzaniga, a cognitive neuroscientist who has been researching the processes of human cognition since the 1960's. Mike's work with split brain patients demonstrates this need to explain graphically. The experiment depicted from 5m30s onwards shows how a patient's left brain, which is ignorant of what caused a behaviour, concocts a story to explain that behaviour. It is striking how convinced the patient is by the explanation fabricated by his left brain.