Crimestop

Crimestop is a concept of Newspeak, featured in George Orwell's 1984. It denotes a learned mental discipline; a conditioned inability to even grasp thoughts contrary to one's own belief system.

"Crimestop means the faculty of stopping short, as though by instinct, at the threshold of any dangerous thought. It includes the power of not grasping analogies, of failing to perceive logical errors, of misunderstanding the simplest arguments if they are inimical to Ingsoc, and of being bored or repelled by any train of thought which is capable of leading in a heretical direction. Crimestop, in short, means protective stupidity."