Recursion

by Tony Ballantyne

  Jay slumped forward, elbows still resting on the railing. She looked thoroughly fed up.

  “I can’t speak to DIANA.”

  Constantine frowned. “I thought they were working on a way to get me out of here.”

  Jay’s expression was a mixture of guilt and sadness. “Don’t you realize that the only reason that I can exist in this place is because I have no links with any other object inside the simulation?”

  —Except us, said Red.

  “Except me,” said Constantine.

  Jay frowned. “I know that, and do you know what a risk it is, me just speaking to you now? You realize there are two personalities in here who will suffer if they catch you? There is no safe way to send out a message.”

  Constantine felt chastened. He looked down at his feet for a moment. The tower cast no shadow here, he noticed; the moon lit up the entire pavement before him.

  He sighed slowly. “I’m sorry, Jay, but we’re running a great risk speaking to those people in the quorum. Either we tell them the secret they’re trying to find out, or, worse, we say nothing and raise their suspicions that we’re holding something back.”

  Jay said nothing. Her hands slid up her face and she began to fiddle with her earlobes in the manner of a little girl. She suddenly realized what she was doing and snatched her hands away, then stared up the side of the tower at the lit upper window.

  Finally she spoke. “Okay. You’ve convinced me. We’ll have to take the risk. I don’t like it, but there you are. I’m going to try and send a message to the real world. I hope our steganography is good enough. Give me a minute.”

  She turned and walked through the open door behind her into the tower. Constantine stood alone for a moment, a forgotten man beneath the night sky. The moonlight picked out the edges of the dark clouds high above with white highlights. Behind him was the brightly lit lobby of his own hotel. He wondered at the way its guests and staff didn’t notice the huge black tower floating just outside their door.

  Jay walked back out onto the balcony, holding something in her hand.

  “If they don’t pick this up the moment it leaves the vicinity of the tower, we should be okay. Heaven knows how they’ll get a message back, though. Catch it, we don’t want it to break.”

  She tossed the object in Constantine’s direction. It tumbled end over end as it fell. There was a brief discontinuity just before it hit the ground when it seemed to shift in its position slightly to the left. The effect reminded him of a stone being dropped in water.

  He dived for it too late. A bottle. It bounced on the ground, once, twice, but didn’t break. His heart pounding, he bent to pick it up. An empty green wine bottle, the space inside it twisted into significant forms.

  A message in a bottle? Constantine straightened to look back at Jay but she had gone. The tower was already two hundred meters up and rising.

  He suddenly felt incredibly lonely. Gripping the bottle tightly, he walked into his hotel.

  Herb 4: 2210

  Herb was in the entertainment tank watching an old movie: a black-and-white flick called The Blue Magnolia, color and dimension enhanced to make it suitable for a modern audience. If only they could have done something to the plot, wished Herb; as far as he was concerned, it made no sense whatsoever.

  Johnston stuck his head above the trapdoor.

  “Okay, Herb, we’re on. Let’s go.”

  Herb felt his heart thumping in his chest. His hand involuntarily tightened around the hard little machine that Robert had given him, now wrapped in a white linen napkin to prevent Herb cutting himself on its sharp edges.

  “No. I thought we had to prepare further. We’re not ready.”

  “We’re as ready as we’ll ever be,” Robert replied. “Come on. Don’t you want to see my ship?” He ducked down into the secret passageway.

  Herb looked around the comfortable surroundings of his own ship and wished it a sad good-bye. He wondered if they would have white leather and parquet flooring where he was going. He doubted it. He gave a sigh and stepped into emptiness over the trapdoor. His body swung smoothly through ninety degrees as he entered the connecting space between the two ships.

  Inside, the secret passageway was longer than it had looked when seen from Herb’s lounge. It echoed and clanked as he walked along it, and beneath those sounds he could feel a shuddering and jarring that suggested the two ships were moving. There was a sudden groaning sound and the passageway itself seemed to deform, twisting this way and that. Herb felt a stab of horror as a hole appeared by his feet and he found himself looking outside, out across to the horizon over a sea of writhing VNMs. That sea was dropping away as the two ships rose higher and higher into the air.

  “Come on,” Robert called from the end of the passageway. “I’m recycling the materials of this passageway. The VNMs aren’t going to hang about while you dawdle in there.”

  Herb began to run to where Robert waited, holes appearing all around him as he went, cold daylight streaming through the sudden gaps. It was odd: the apparent gravity of the passageway was perpendicular to that of the planet. Which way would he fall if he stepped through a hole? Out, or down? Or neither? Would the gravity field hold strong beneath his feet?

  Herb stepped, panting, into Robert’s ship and looked around the interior expectantly.

  It was completely empty. A bare room lit with pale blue light from the ceiling. It reminded Herb of a VR room when the entertainment had finished. No, more than that, it reminded him of old images he had seen of film sets when all the props and scenery had been cleared away. Robert’s ship was an empty shell waiting to be filled with the furniture and controls that would make it a real spacecraft.

  “Anything wrong, Herb?” Robert smiled faintly as Herb stared around the bare cuboid of the room. Two bumps in the angle between the floor and the rear wall were the only hint that something more to this ship lay beyond the bare surfaces. Herb guessed part of the motors protruded into the room at those points. He looked at Robert in astonishment.

  “Where’s the rest of this ship? Or is this another one of your jokes? Is it all hidden away somewhere? Or is this a VR projection?”

  “No. It’s another test. Something for you to figure out. By the way, you should step clear of the hatch now. We are about to make a warp jump into space.”

  Wordlessly, Herb stepped away from the opening in the floor from which he had just emerged. A panel slid across it, smoothly sealing the gap.

  “Okay,” said Robert. “First stop, orbit, to make a copy of your ship, and then we jump right into the heart of the Enemy Domain.”

  Herb tilted his head to one side and gazed at Robert appraisingly. “You’re a robot, aren’t you?” he said. “I should have guessed as much. That’s how you always managed to stay one jump ahead of me.”

  Johnston nodded once at Herb’s grin. “I can see that’s managed to salvage your ego a little,” he said dryly.

  Herb continued around the room, tapping at the smooth grey walls as he went.

  “That’s why you don’t need anything in here. No beds or sofas or kitchen or…or…anything.”

  “Yes,” Robert said dismissively, then changed the subject. “I’m about to activate the reproductive mechanism on your own ship. Do you want to watch?”

  Without waiting for a reply, Robert called up an external view on one wall. Herb saw the final stages of his ship’s warp transition from the planet’s surface, watched it slotting itself back into normal space with a faint shimmer.

  Herb frowned suspiciously. “Why are you making a copy of my ship?”

  “We’ll be jumping into the Enemy Domain in one of them. We’re keeping the other one as a spare to get us out.” He gave Herb a despairing look. “We can’t stay on mine, can we? There are no facilities here.”

  Herb’s voice held a faint tremble. “Why will we need another ship to get out? What will happen to the first one?”

  Robert pointed to the sharp little linen-wrapped machine that
Herb carried in his hand.

  “It will be eaten by that VNM you are carrying. It’s a superfast replicator: makes a copy of itself every point seven seconds. First rule of wiping out a VNM infestation: if it can reproduce faster than you, you have to encircle it and work inwards. Very time-consuming, and you run the risk of some of the infection escaping through the gaps in your net. But if you can reproduce faster than the enemy, then you start in the middle and work outwards. We’ll be chasing the infestation, but we know we will catch it in the end.”

  “What will happen to me? Will I be on the ship?”

  “You’ll be okay,” said Robert. “That machine you’re carrying prefers to convert nonorganic materials.”

  “Oh.”

  Robert gave Herb a significant glance. Herb ignored it. Looking outside, he could see that his ship was warping and deforming. A long bulge formed along the upper surface as a second ship began to grow.

  “Look at that,” Robert said, pointing to Herb’s pregnant spacecraft. “You humans astonish me sometimes. Every adult, every child even, has access to machinery that can reproduce in that way. Haven’t you ever wondered why the universe isn’t already choked up with your junk?”

  Herb looked at him in puzzlement. “But it’s illegal to make unauthorized copies. You need a license to operate a VNM on Earth. They need materials with which to make copies of themselves: you could be stealing someone else’s resources.”

  Robert laughed. “It’s illegal to convert planets into masses of flickering VNMs, but that didn’t stop you giving it a try.”

  “So? You caught me and stopped me.”

  “And I’ve caught twenty other young men and women before you. Did you ever hear of Sean Simons? He was a young man, just like you. Rich father, too much sense of his own importance. Bit more malice, mind. He deliberately set about converting a planet.”

  “Doesn’t sound familiar.”

  “Really? Check the news files. He went missing.” Robert looked at Herb darkly. “I know where he is, though,” he added softly.

  Herb felt a little chill, but it quickly dulled. The featureless pale blue room had assumed the aspect of a place apart from reality: a waiting room where they paused while the main events prepared to take place.

  “We can’t catch everyone, though. Hasn’t it occurred to you that there may be deeper forces at work here? Every human with a gram of common sense can get hold of a warp drive and a self-replicating machine. You could fill the galaxy with little silver cigars before teatime.”

  Herb was impatient. “I know; that’s what the EA is for. That’s what we’re working to prevent now, isn’t it?”

  Robert looked at Herb for a moment then shook his head in disbelief.

  “No. I give up. You really don’t see it, do you?”

  Outside, the bulge in the top surface of Herb’s ship had grown a lot larger. The second ship would soon begin tearing itself free.

  They were moving through space, the two ships accelerating away from Herb’s accidentally converted planet. Herb felt an odd pang of loss as he saw that dull grey disk getting smaller as they moved faster and faster. Just behind them, his pregnant spaceship went through the final throes of labor.

  Robert stood at Herb’s shoulder, looking on appreciatively.

  “What’s the gestation period?” he asked.

  Herb smiled with paternal pride. “Twenty-five minutes under optimal conditions. And it can do that every two hours, assuming an appropriate source of construction matter is at hand.”

  “Oh, I know where there is one,” said Robert. He looked back at Herb’s ship and then clapped his hands together.

  “Oh well. Five more minutes until the ships have separated. Then we jump.”

  “Is that it?” asked Herb. He suddenly needed the toilet, and he was acutely aware there was nowhere to go on Robert’s ship. He also wanted to change his clothes. Silk pajamas and a pair of paper slippers may make good ship wear, but he felt incredibly exposed at the thought of landing dressed like that in the middle of the Enemy Domain. He needed body armor. An ABC suit. It was too late for all that.

  Herb’s mouth felt dry. “Don’t you have any advice for me?” he asked plaintively.

  “Yes. Just do as I say.”

  “Oh.”

  Herb licked his dry lips. So this was it. He gazed around at the illuminated walls of the spaceship, looked through the viewing field at the receding disk of his abused planet, and wondered sadly how it had come to this.

  He thought back to the day that he had left Earth. Walking across the dew-soaked lawn beneath a cloudless blue April sky that seemed to go up forever. His spaceship had sat waiting on the grass ahead of him. Herb had paused for a moment to glance around at the beautiful spring morning. The sight of his father’s house, the green copper dome on its roof, the cream-painted stone walls and the windows reflecting the early morning sunshine. What could he find in space that couldn’t be equalled or surpassed by that morning?

  Now he wondered: would things have been different if he hadn’t taken off then?

  Herb didn’t know. All he knew was that in three minutes he would be jumping to almost certain death. He looked miserably around Robert’s ship again. The pale blue room, the dark viewing area…

  He felt sick.

  Herb’s spaceship had separated into two new ships. Two creamy white boxes that tumbled slowly through space behind them. Robert looked on, impressed.

  “Almost perfectly balanced,” he whispered. “Only a fraction of a gram’s difference between the two. And only a total mass of one point seven grams lost in the process.”

  Herb nodded in terrified agreement. The two ships that now floated behind looked identical to him. He would have expected no less, of course. The twin ships began to drift apart.

  “What now?” asked Herb.

  “One’s going back to your converted planet to replenish its mass. We’re going to board the other and make the jump into the Enemy Domain.”

  “What about restoring our ship’s mass?” asked Herb frantically, hoping for a way to delay the impending jump. “It won’t be working at optimal efficiency at only half mass. What if we’re attacked? The walls will be too thin to deflect any attack.”

  Robert gave a little laugh. “The thickness of the walls will make no difference when the Enemy Domain attacks. The ship may as well be made of rice paper for all the protection it will give us.”

  There was a faint sigh and the floor hatch opened up. Robert gestured towards it.

  “Okay, Herb, our new ship has docked. After you.”

  Herb felt his stomach sink. His hand tightened around the sharp little VNM Robert had given him.

  He stepped into the hatchway. Robert followed.

  The replication was very good. The ship was identical to the original, right down to the copy of The Blue Magnolia, now coming to its conclusion in the entertainment tank. Herb ran his hand across the white leather of the sofa. It felt just as soft, just as cool. Did the ship carry spare leather, he wondered?

  He could almost believe that the replication hadn’t taken place, that he was back on his original ship, but of course there was no original ship now. It had split into two identical copies, each of half the original mass. A display had lit up on one wall informing him of the fact. If he cared to, he could examine the status of the fission right down to the subsystems level. Herb didn’t care.

  Robert was at work meanwhile altering the ship’s interior, opening viewing fields in all four walls and the ceiling. Smaller viewing fields opened in the floor, interspersed with screens across which multicolored lines and patterns scrolled. Status screens. Herb found himself standing in a viewing field, a silver puddle of light shimmering around his ankles.

  “Sit on that sofa,” said Robert, pointing to the one opposite. “I’m arranging it so we can see everything from the conversation area.”

  Herb stepped out of the puddle and sat down opposite Robert.

  A sudden jerk pushed hi
m back into his seat. It was followed by two more that knocked him over to the left.

  “Sorry. I’m just trying to get the gravity field adjusted. We barely got enough exotic matter in the division to enable the warp jump. There’s not much left over to maintain gravity.” Robert grimaced. “If the enemy gets us in a steep enough gravity gradient, we’ll be smeared across the inside of this ship like butter.”

  “Thanks,” said Herb, turning pale.

  “Actually, that won’t happen,” Robert said happily. “I forgot. The hull is so weak after the separation, the ship will crumple along with us. It will be like sending a bag of blood through a mangle.”

  Herb moaned.

  Robert paused in his work and looked at him.

  “Don’t worry, Herb. There’s nothing to worry about. We’re going to win. Just remember, the EA AI is far more intelligent than anything in the Enemy Domain. It’s not about the Enemy’s greater strength, it’s about the intelligent application of force. Ask any swordsman: the point beats the edge every time.”

  “I’m not comforted,” said Herb.

  “Well, I tried.” Robert sighed.

  Herb was shaken around on the sofa by another series of violent jerks. Throughout the sudden shuddering motion he could sense a steady acceleration, usually hidden by the internal gravity field.

  A mapping of the Enemy Domain suddenly appeared above their heads, a cloud of silver and rose with significant features picked out in gold and blue. Robert gazed up at it and nodded in satisfaction. It vanished and Robert turned and looked at several of the viewing fields he had opened up around the ship, checking that everything was okay.

  “Have you got your VNM?” he asked Herb, who wordlessly held it up. Tiny scarlet drops of his blood shimmered on the edge of the sharp metal points that had cut their way through the thick linen cloth in which the machine was wrapped. Herb hadn’t even felt any pain. The ship’s gravity cut out again and he felt himself pushed back against the seat. Herb wondered why it was necessary to travel quite so fast. What was the point when they were about to make a jump? They would only have to slow down again at the other end.