The frown on Whistler’s face grew deeper. Once, he looked up at the two others and began, "This is unbel – " and turned back to his work.
Finally, he said hoarsely, "I can give you an unofficial answer." His eyes were red-rimmed. "The official answer awaits complete analysis. Do you want it unofficial?"
"Go ahead," said Meyerhof.
Trask nodded.
Whistler darted a hangdog glance at the Grand Master. "Ask a foolish question – " he said. Then, gruffly, "Multivac says, extraterrestrial origin."
"What are you saying?" demanded Trask.
"Don’t you hear me? The jokes we laugh at were not made up by any man. Multivac has analyzed all data given it and the one answer that best fits that data is that some extraterrestrial intelligence has composed the jokes, all of them, and placed them in selected human minds at selected times and places in such a way that no man is conscious of having made one up. All subsequent jokes are minor variations and adaptations of these grand originals."
Meyerhof broke in, face flushed with the kind of triumph only a Grand Master can know who once again has asked the right question. "All comedy writers," he said, "work by twisting old jokes to new purposes. That’s well known. The answer fits."
"But why?" asked Trask. "Why make up the jokes?"
"Multivac says," said Whistler, "that the only purpose that fits all the data is that the jokes are intended to study human psychology. We study rat psychology by making the rats solve mazes. The rats don’t know why and wouldn’t even if they were aware of what was going on, which they’re not. These outer intelligences study man’s psychology by noting individual reactions to carefully selected anecdotes. Each man reacts differently… Presumably, these outer intelligences are to us as we are to rats." He shuddered.
Trask, eyes staring, said, "The Grand Master said man is the only animal with a sense of humor. It would seem then that the sense of humor is foisted upon us from without."
Meyerhof added excitedly, "And for possible humor created from within, we have no laughter. Puns, I mean."
Whistler said, "Presumably, the extraterrestrials cancel out reactions to spontaneous jokes to avoid confusion."
Trask said in sudden agony of spirit, "Come on, now, Good Lord, do either of you believe this?"
The senior analyst looked at him coldly. "Multivac says so. It’s all that can be said so far. It has pointed out the real jokesters of the universe, and if we want to know more, the matter will have to be followed up." He added in a whisper, "If anyone dares follow it up."
Grand Master Meyerhof said suddenly, "I asked two questions, you know. So far only the first has been answered. I think Multivac has enough data to answer the second."
Whistler shrugged. He seemed a half-broken man. "When a Grand Master thinks there is enough data," he said, "I’ll make book on it. What is your second question?"
"I asked this. What will be the effect on the human race of discovering the answer to my first question?"
"Why did you ask that?" demanded Trask.
"Just a feeling that it had to be asked," said Meyerhof.
Trask said, "Insane. It’s all insane," and turned away. Even he himself felt how strangely he and Whistler had changed sides. Now it was Trask crying insanity.
Trask closed his eyes. He might cry insanity all he wished, but no man in fifty years had doubted the combination of a Grand Master and Multivac and found his doubts verified.
Whistler worked silently, teeth clenched. He put Multivac and its subsidiary machines through their paces again. Another hour passed and he laughed harshly. "A raving nightmare!"
"What’s the answer?" asked Meyerhof. "I want Multivac’s remarks, not yours."
"All right. Take it. Multivac states that, once even a single human discovers the truth of this method of psychological analysis of the human mind, it will become useless as an objective technique to those extraterrestrial powers now using it."
"You mean there won’t be any more jokes handed out to humanity?" asked Trask faintly. "Or what do you mean?"
"No more jokes," said Whistler, "now! Multivac says now! The experiment is ended now! A new technique will have to be introduced."
They stared at each other. The minutes passed.
Meyerhof said slowly, "Multivac is right."
Whistler said haggardly, "I know."
Even Trask said in a whisper, "Yes. It must be."
It was Meyerhof who put his finger on the proof of it, Meyerhof the accomplished jokester. He said, "It’s over, you know, all over. I’ve been trying for five minutes now and I can’t think of one single joke, not one! And if I read one in a book, I wouldn’t laugh. I know."
"The gift of humor is gone," said Trask drearily. "No man will ever laugh again."
And they remained there, staring, feeling the world shrink down to the dimensions of an experimental rat cage – with the maze removed and something, something about to be put in its place.
The Last Question
The last question was asked for the first time, half in jest, on May 21, 2061, at a time when humanity first stepped into the light. The question came about as a result of a five-dollar bet over highballs, and it happened this way:
Alexander Adell and Bertram Lupov were two of the faithful attendants of Multivac. As well as any human beings could, they knew what lay behind the cold, clicking, flashing face – miles and miles of face – of that giant computer. They had at least a vague notion of the general plan of relays and circuits that had long since grown past the point where any single human could possibly have a firm grasp of the whole.
Multivac was self-adjusting and self-correcting. It had to be, for nothing human could adjust and correct it quickly enough or even adequately enough. So Adell and Lupov attended the monstrous giant only lightly and superficially, yet as well as any men could. They fed it data, adjusted questions to its needs and translated the answers that were issued. Certainly they, and all others like them, were fully entitled to share in the glory that was Multivac’s.
For decades, Multivac had helped design the ships and plot the trajectories that enabled man to reach the Moon, Mars, and Venus, but past that, Earth’s poor resources could not support the ships. Too much energy was needed for the long trips. Earth exploited its coal and uranium with increasing efficiency, but there was only so much of both.
But slowly Multivac learned enough to answer deeper questions more fundamentally, and on May 14, 2061, what had been theory, became fact.
The energy of the sun was stored, converted, and utilized directly on a planet-wide scale. All Earth turned off its burning coal, its fissioning uranium, and flipped the switch that connected all of it to a small station, one mile in diameter, circling the Earth at half the distance of the Moon. All Earth ran by invisible beams of sunpower.
Seven days had not sufficed to dim the glory of it and Adell and Lupov finally managed to escape from the public function, and to meet in quiet where no one would think of looking for them, in the deserted underground chambers, where portions of the mighty buried body of Multivac showed. Unattended, idling, sorting data with contented lazy clickings, Multivac, too, had earned its vacation and the boys appreciated that. They had no intention, originally, of disturbing it.
They had brought a bottle with them, and their only concern at the moment was to relax in the company of each other and the bottle.
"It’s amazing when you think of it," said Adell. His broad face had lines of weariness in it, and he stirred his drink slowly with a glass rod, watching the cubes of ice slur clumsily about. "All the energy we can possibly ever use for free. Enough energy, if we wanted to draw on it, to melt all Earth into a big drop of impure liquid iron, and still never miss the energy so used. All the energy we could ever use, forever and forever and forever."