“Deeper, deeper, Huvane. The brain lies prisoner within a cell of bone. Its contact with the Outside world lies along five channels of sensory communication. Everything that the brain believes about the Universe is the product of sensory information carried inward by sight, touch, sound, taste and smell. From five basic bits of information, knowledge of the Great Truth is formed through logic and self-argument. Everything.”
“But—”
“Oh, now stop. I am not expressing my own singular opinion. I believe a rather great proportion of the things that I was taught, and I was taught through the self-same five sensory channel.”
“Um-m-m.”
“Good. Just plain ‘Um-m-m.’ Now we shall shut off the Terran’s channels of communication until he consents as an alternative. This, Huvane, hasn’t been tried before. It may bring us the final important bit of information.”
Slowly the lights went out. Jerry Markham was prepared for dark isolation, he could do nothing about it so he accepted it by the simple process of assuring himself that things were going to get worse before they got better.
The darkness became—absolute. Utter. Complete. Not even the dots and whorls and specks that are technically called “Visual noise” occurred. A level of mental alertness niggled at him; for nearly twenty-four years it had been a busy little chunk of his mind. It was that section that inspected the data for important program material and decided which was trivial and which was worthy of the Big Boy’s attention. Now it was out of a job because there wasn’t even a faint background count of plateau-noise to occupy its attention.
The silence grew—vast. Brain said that the solid walls were no more than ten feet from him; ears said that he was in the precise middle of absolutely nowhere. Feeling said that the floor was under his feet, ears said that upward pressure touched his soles. Deeper grew the deadening of his ears, and orientation was lost. Feeling remained and he felt his heart beating in a hunting rhythm because the sound-feedback through the ear was gone, and the hortator had lost his audible beat.
Feeling died and he knew not whether he stood or sat or floated askew. Feeling died and with it went that delicate motor control that directs the position of muscle and limb and enables a man to place his little finger on the tip of his nose with his eyes closed.