Perihelion

Chapter 3. Relapses

Derec was quivering with tension, but he forced himself to stay clear-headed. “Mandelbrot?”

“I am finding it difficult to concentrate. I am dwelling on this problem and going in circles. If I enter a closed loop on the First Law, I will be useless to you.”

“Now listen to me! Before you go into any kind of closed loop, uh-okay, I’ve got it. Listen.” Derec was talking fast, really before he had more to say. “Urn…”

“I am listening,” said Mandelbrot.

“Maybe ‘u have more information to give ‘irn,” Wolruf suggested. She got down from the chair and stood in front of Mandelbrot, straining her neck to look up at him.

“Yes! That’s it,” said Derec. “Mandelbrot, we’re working with limited information on Ariel. The process she went through was experimental, but I think it worked. I reprogrammed her memory myself. We have to give it a chance.”

“People will have relapses,” Ariel pointed out, in a tightly controlled tone. She was gripping the edge of the desk so hard that her fingertips were white.

“These appear to be similar to a mechanical malfunction,” said Mandelbrot. “Certainly medical care is a logical and customary treatment to facilitate healing.”

“No!” Ariel wailed. “People don’t just fall apart in a straight line like machines. I may be just fine.” Her voice broke at the end, and she blinked back tears, turning away from Mandelbrot.

“I understand,” said Mandelbrot. “Inaction may not necessarily cause further harm to you.”

“Exactly.” Derec let out a long sigh of relief and caught Wolruf’s eyes. She made a face that might have been her version of a wink and then hopped back up on the chair.

“Maybe we can build on that and find out something at the same time,” said Derec. “Mandelbrot, I want to see if your attempts to get information through the city computer are blocked. That will tell us just how special this terminal is. Can you concentrate now on a function of that kind?” Distracting him wouldn’t hurt at the moment.

“Yes, Derec. I judge that the apparent First Law contradiction is still incomplete. The potential loop will close no further unless I receive more evidence that inaction could cause harm.”

“Good.” Derec sat down on the edge of the desk. “Now, last night we found out that the computer would not admit the existence of this office to you. I want to know if that has changed. I ordered it to block all information about our presence here. See if you can call up any hint of our using the facilities here.”

“I am trying several avenues,” said Mandelbrot. His voice was returning to normal. “I’m asking for information about intruders, humans, and energy consumption or oxygen usage in the Compass Tower.”

“What do you get?”

“All is as you instructed,” he answered promptly. “I am told that the office is not listed anywhere. Nor are the water or nutrient tanks in the chemical processor listed. No alerts of any kind have been entered since our arrival.”

“Good!” Derec grinned. “So we really are safe here. Our next problem is to get a line on Avery. Ariel, may I?” He slid off the desk and nodded toward the terminal.

“Of course.” She rose carefully, leaning her fingertips on the desk as though she was worried about her balance.

“Derec,” said Mandelbrot. “I suggest that we attempt parallel work with the city computer. The result should confirm or disprove your suspicions.”

“Good idea. I’ll enter questions and tell you what I’m doing.” Derec seated himself comfortably and started on the keyboard. “All right. How many humans are on the planet of Robot City right now?”

“I learn none,” said Mandelbrot.

“Ha! I’ve got one,” said Derec triumphantly. “Where is this human at the present time?”

“SEATED BEFORE THIS TERMINAL,” said the terminal.

Derec smiled wryly despite his disappointment. “Serves me right,” he muttered. “Wait a minute-” He typed in the question, “How do you know I’m human and not a robot?”

“THE CONSUMPTION OF NUTRIENTS FROM THE CHEMICAL PROCESSOR, USE OF WATER IN THE PERSONAL, AND CHANGES IN THE COMPOSITION OF THE AIR IN THE OFFICE INDICATE THE PRESENCE OF AT LEAST ONE HUMAN. THE PROBABILITY OF THE PRESENCE OF MORE THAN ONE HUMAN BASED ON THE AMOUNT OF HEAT GENERATED IN THE ROOM IS HIGH. COMBINING THIS FACT WITH THE ABILITY OF ROBOTS TO CONTACT THE CITY COMPUTER DIRECTLY THROUGH THEIR COMLINKS INDICATES THE PROBABILITY THAT YOU ARE HUMAN.”

Derec felt a twinge of panic. “So the use of this office has been recorded in the computer, after all?” His fingers fumbled on the keys, and he had to retype the question twice.

“NO.”

“Explain your knowledge of this information, then.”

“INFORMATION FROM THIS OFFICE IS STORED IN LOCAL MEMORY AT THIS TERMINAL. IT HAS NOT BEEN SENT TO THE CITY CENTRAL COMPUTER, PER YOUR INSTRUCTION.”

“Is the information in your local memory available to anyone else, anywhere?”

“NEGATIVE.”

Derec relaxed then, rubbing his fingertips against each other. At some point, he would no longer be able to use the keys. Someone else could handle the keyboard if necessary, but that would mean admitting his disability.

“What’s wrong?” Ariel asked.

“False alarm.” Derec placed his fingers back on the keyboard and thought a moment. Then he entered, “What other locations indicate similar evidence of human presence on this planet?”

“NONE.”

“I’m not surprised.” He looked at the others. “Wherever our paranoid friend is hiding, he had the presence of mind to keep that information unavailable, even here.”

“Maybe especially here,” said Ariel, “if he was expecting us to search this office.”

“Maybe ‘e lefft,” suggested Wolruf. “Used a Key to leave the planet entirrely.”

“Oh, no.” Ariel looked from her to Derec. “You don’t think he left Robot City, do you? How can we find him then?”

Derec set his jaw grimly. “Wherever he is, we have to pick up his trail here.”

“But if he has kept all the information out of the computer, we won’t have any to find.” Ariel’s voice was cracking again.

Wolruf moved to her side in a silent offer of moral support.

“Mandelbrot,” said Derec. “Find out if any humans have been treated at that medical facility. If you can think of any more avenues for reaching evidence of humans on the planet, go ahead and follow them. And if you don’t get any results, let me try.”

“Yes, Derec.”

Derec put his hands on the keyboard again and missed the first two keys he tried. “Wait a minute. We can shortcut this. Mandelbrot, you sit down at this terminal and use it.” He got up carefully, looking at Ariel and Mandelbrot to see if they had noticed his mistakes on the keyboard. If so, they did not show it.

Wolruf was eyeing him closely, but she said nothing. Instead, she left Ariel’s side and took a position where she could watch the screen as Mandelbrot worked on it.

“Mandelbrot,” said Derec, “turn on the viewscreens.” He turned to face one wall, hands on hips.

A moment later, the little office was flooded with light. On all sides, Robot City bustled on the ground far below them, stretching away until it vanished over the horizon. Above them, the sky shone down with brilliant sunlight.

Ariel turned slowly, as though in awe. “I don’t recognize any of it,” she said softly.

Derec saw towers, spires, swirls, and loops in the architecture he had never seen here before, either. Humanoid and function robots moved about on the streets and on vehicles or machinery everywhere. He remembered that single-rnindedness, that sense of purpose, from the asteroid where he had first seen the Avery robots.

Circuit Breaker, the distinctive structure that had revealed the ability of Robot City robots to think and dream creatively, was gone.

“The changes are extensive,” said Derec. “It’s not your memory at fault right now.”

“The shapechanging has to be stopped,” said Ariel. “It’s causing the massive rainstorms every night.”

“What?” Derec turned to stare at her.

She clutched at his chest, looking over his shoulder at visions only she could see. “The floods. They’re caused by the shapechanging mode in the city’s central core. We must stop it!”

Mandelbrot had already left the terminal and was gently reaching out to pull Ariel away from Derec.

“It’s just a temporary relapse,” said Derec quickly. “It doesn’t mean she’s getting worse. Understand?”

“I understand,” said Mandelbrot. He was easing Ariel into a sitting position on the bed. “You know, however, that discussing the shapechanging mode a short time ago did not trigger a relapse. Her condition is inconsistent at best.”

“Apparently her memories aren‘t anchored in a chronological perspective.” Derec paused, still watching Ariel. His impulse to hold her, to protect her, was held in check by his fear of somehow making the relapse worse.

Her eyes were closed and she was taking short, shallow breaths. She was sitting up on her own, though. Gradually, her breathing slowed down and approached normal.

Satisfied that she was out of immediate danger, Derec continued with his thought. “Something triggers a memory, and she relives it as a current experience. Or at least, it seems that way so far.”

“A bad experrience,” said Wolruf.

Ariel seemed to be gaining her composure. Derec looked out at the city again. He was sure that the unfamiliar skyline had not resulted from the old shapechanging mode, but was simply the result of constant refinement on the part of the robots.

Suddenly he moved to the terminal and entered another question. As before, he made a number of errors, far more than usual. He slowed down and typed them correctly. “Is the city functioning under any defensive overrides of the type represented by the shapechanging mode it once entered in response to parasites in human blood?”

“NO.”

“Is it operating under any overrides to basic programming?”

“NO.”

He stared at the screen, somewhat disappointed. “Is something wrong?” Mandelbrot asked.

“Not exactly. I was just thinking that if the city was under an emergency of some sort, I might have been able to use it to our advantage somehow.”

“If Dr. Avery is on the planet, he probably would have dealt with an emergency already,” said the robot.

“Or maybe he left, but no crisis has arisen.” Derec shook his head in resignation. “He could be literally anywhere, with a Key to Perihelion. Or with all the Keys the robots could duplicate, for that matter.”

“It’s not shapechanging any more, is it?” Ariel was gazing out at the city.

Derec and Mandelbrot both looked at her in some surprise.

“No,” Derec said, relieved. “We ended it a long time ago. That danger is passed.”

She nodded, still gazing out at the city.

He watched her for a moment and decided that leaving her alone might do her more good than grilling her with questions. She was self-conscious enough already, though her quick recovery from this episode was encouraging. He just hoped that he was right about her not needing treatment by the robots. Then he saw Mandelbrot studying her, also.

“Mandelbrot,” Derec said firmly. “Her relapse is over.”

“It may recur, I surmise.”

“Another one may occur, but I don’t think the same one will.” Derec hesitated, thinking about the two episodes he had seen since they had returned here.

“We have compiled very little evidence for that conclusion,” said Mandelbrot.

Derec shook his head. “I think that every time something of that sort happens, her memories are integrated just a little more afterward. It’s part of the growth and replacement process that I didn’t recognize at first.”

“I understand the principle,” said Mandelbrot. “How certain of this theory are you?”

“Uh-” Derec saw Ariel watching him.

Her face reflected more anxiety than he had ever seen her express, even at the worst of her disease.

He looked back at the robot and cleared his throat. “I’m sure of it. Remember, the growth of her memories and identity was intended all along. These episodes are just…growing pains.”

Ariel closed her eyes in relief.

Derec sighed. He felt as though he was juggling too many lines of thought at once-Ariel’s recovery, Mandelbrot’s possible First Law imperative regarding her, and his own failing condition. What he really should be doing was finding Dr. Avery.

He took a deep breath and tried to focus his thoughts once more. “All right. We can figure that Avery has hidden all direct evidence of his whereabouts from the central computer. We’ll have to cast around for indirect evidence that he didn’t intend to leave. Anyone have any suggestions?”

Ariel looked at him for a moment and then returned her gaze to the viewscreens with a slight shake of her head.

Mandelbrot stood quietly, apparently reviewing and rejecting possibilities.

“We can’t find him by staying here in this room, can we?” Derec spoke softly, admitting what none of them wanted to say.

“The principle of identifying useful questions and seeking their answers through the central computer is sound,” said Mandelbrot. “Theoretically, the search could be narrowed a great deal in this manner if we ask the right questions.”

“And if we can’t?” Derec demanded irritably. “What then? Maybe we don’t have enough information to figure out the right questions, no matter how long we sit here.”

“Leaving this office to explore the planet greatly increases the danger to you,” said Mandelbrot.

“Now don’t you start more First Law objections. Sitting here doing nothing will eventually harm us the most.”

“I am not arguing against leaving itself,” said Mandelbrot calmly. “I do recommend a specific plan of action.”

Derec shrugged in agreement. “Like what?”

“That has yet to be identified.”

“We’re going around in circles!” Derec threw up his arms in frustration. He banged one hand against the desk when he lowered it and grabbed it in surprise.

Wolruf was watching him again.

“I suggest that Wolruf and I go out first,” said Mandelbrot.

“How so?” Derec rubbed his hand surreptitiously, pointedly ignoring Wolruf.

“Consider this. As a robot, I do not attract undue attention here. On our first sojourn through Robot City, Wolruf was of no particular interest to the robots of this community. We have the best chance of gathering information and returning here safely to report it.”

Derec thought a moment. ‘The terminal here confirmed your report that no special alerts are out. So the robots aren’t on the lookout for humans, particularly.”

“The presence of humans, however, will at the very least trigger the applicability of the Laws of Robotics. If their behavior is changed because of the Laws, even in small ways, the shifts may be noted by the central computer and attract the notice of Dr. Avery.”

“You mean if I instruct a robot to tell me something, he might be late fulfilling his duties or something.” Derec nodded slowly. “With someone as paranoid as Dr. Avery, I guess maybe those small variations might cause a review…if he noticed them.”

“I am calculating probabilities only, of course,” said Mandelbrot. “I am balancing potential benefit against possible danger.”

Derec realized, suddenly, that he welcomed the chance to rest. He didn’t think of himself as a coward, or feel afraid. In fact, the Robot City he remembered had not been nearly as dangerous as Aranimas, the pirate. Still, he just didn’t feel right. Maybe he should lie down.

“All right, Mandelbrot,” he said. “You two go. We’ll stay here.”