An illustrated audio excerpt
from Dianetics: The Modern Science of Mental Health

The sentient portion of the mind—the actual computing ability of Man—is never in error. Yet if the mind always computes perfectly on the data that it has stored and perceived, how is it then that people make errors in judgment?

Just as with a machine that has a held down “7” button, when incorrect data gets fed into the human memory banks, it can cause a person to make errors and act in an abnormal manner.