In the mid-seventies, as part of an experiment in a psychology class, a blind student had been made hypnotically deaf (the signal to awaken was a touch on the shoulder). When the professor fired a blank pistol near his ear, the student didn’t flinch. On a whim, the professor then asked the blind and now-deaf student that if some part of his consciousness was still listening, to please raise his index finger. To everyone’s surprise, the finger raised. Even more strangely, the student then asked the professor why his finger had raised.

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