Lieutenant Quantum Observer counted to seventeen before she answered the Captain. It was not a long pause—less than a second by the ship's clock—but for her it contained seventeen different rooms, seventeen different conversations, and seventeen different versions of the same question.
"Observer. Status." Captain Navigator's voice reached her through all of them at once, a chord rather than a single note.
She tried to give the answer she had rehearsed. In one room it came out clearly. In another she stammered. In a third she began weeping before the first syllable. In a fourth she was already dead, slumped over her console, and the version of her still alive felt the weight of her own corpse somewhere adjacent and below.
"I am—" Seventeen voices. "—I am functional."
It had started three ship-days ago, although ship-days had become a polite fiction. The crew of the Chronos maintained them the way the faithful maintain a prayer. The anomaly did not care. Time on the ship now ran in seams. Some decks were minutes ahead. Some were hours behind. In the crew quarters there were stretches where Observer had found her own bed already occupied by a version of herself who refused to wake, and other stretches where her bed had not yet been built.
It had started three ship-days ago. It would start three ship-days ago. It was starting.
The Mirror Problem
Dr. Causality called it temporal superposition. Chief Engineer Loop called it "the worst thing that has ever happened to a maintenance schedule." Observer had begun to call it, privately, the gift, because the alternative was calling it what it really was, and she could not yet afford to do that.
The gift was this: when she looked at a console, she saw all possible console states at once. When she listened to a voice, she heard every inflection the speaker had ever used with her. When she made a decision, she watched herself make every other decision too, branching away in tidy rows, each branch carrying its own version of her into rooms she would never enter.
The mirror was worse. There was a mirror in her cabin, small, bolted to the bulkhead beside the door. In the first day she had seen herself multiplied, a honeycomb of faces. In the second day the faces had begun to move independently. By the third day they had begun to answer her.
"Don't trust the one on the bridge," the leftmost Observer had told her that morning. "She is already outside the loop. She doesn't know what we know."
"Don't trust her either," a different Observer had added, pointing at the first. "She is from a branch where we betrayed the Captain."
"You are all me," Observer had whispered.
"Yes," the mirror had answered, in chorus. "That is the problem."
A Meeting, Seventeen Times
The senior staff met in the briefing room at 0800. They met there at 0759, and at 0801, and at 0800 in a room that did not yet exist because the deck was one minute behind the rest of the ship. Observer attended them all.
She tried to keep notes on which meeting was which. In one, Navigator was in a good mood. In another he was not speaking to Causality. In a third Causality was not present at all, and no one commented on it, as if the doctor had simply been subtracted from the ship.
"We have an option," Causality was saying in every version of the meeting, though the words were different each time. "The entity inside the anomaly can be addressed."
"Addressed." Navigator's word.
"Spoken to. Perhaps bargained with."
"And you believe this because—"
"Because someone is speaking to us."
Observer, in seventeen versions of herself, felt seventeen variations of the same cold feeling arrive behind her sternum. She had not told the senior staff about the mirror. In nine of the branches, she had resolved to keep the mirror to herself. In six, she had decided to report it after this meeting. In the remaining two, the mirror had already broken, and those versions of her were the steadiest.
"Lieutenant Observer." Navigator's voice, cleanly. "You have said almost nothing. You are usually first with a theory."
She made her mouth form a single word. "Listening."
The Count
Alone in her cabin afterward—alone being another polite fiction, since at least five of her were in the cabin at any given moment—she did the count.
Seventeen simultaneous Observers. She knew the number because she had felt each of them arrive. The first had been a thin doubling, a sense of walking beside herself. The second had felt like a gentle duet. By the seventh it had become a choir. By the fourteenth she had begun to lose the center. By the seventeenth—which had arrived this morning, while she was pulling on her uniform—she had stopped being sure which Observer was the one doing the pulling.
Pattern, she thought. There has to be a pattern. Prime number. Not a coincidence. Not with the anomaly.
She drew it on the back of a requisition form, because paper did not seem to be drifting as much as the consoles did. Seventeen points. She connected them. They did not form a circle. They formed a spiral, tightening inward.
An eighteenth point had to exist, she realized. The spiral was not complete. Something about the shape wanted a center. A point where all seventeen branches became one again.
If she could reach it, perhaps the rest of her would follow.
The Offer
That night—an approximation of night, the ship's lighting was on the same schedule as before, as if schedule were still a meaningful word—the mirror spoke unbidden.
"You are almost ready," it said. All seventeen faces were saying it. "You are closer to the center than any of the others."
"The others?"
"The crew. They are still mostly one person each. You are almost mostly one person. You are almost almost one."
"If I reach the center, what happens?"
The mirror paused. For the first time since the fractures began, Observer was sure that all of her, in all branches, was listening to the same thing at the same moment.
"You will choose," the mirror said. "The loop is held together by a version of each of you. Find the one who chose it, in every branch, and you end it. Find any other, and you continue."
"How do I tell the difference?"
"You cannot," the mirror said. "That is the mercy and the cruelty of the offer."
Observer put her hand against the glass. Her own hand came up to meet it on the other side, but only from eleven of the seventeen faces. The remaining six did not move.
"The others are already deciding," the mirror said, more gently. "Engineer Loop is deciding in his sleep. Dr. Causality is deciding in the lab, even if she does not know it yet. Whoever arrives at the center first will decide for the ship."
"Who is the entity," she said, not quite as a question. "The one Dr. Causality says is speaking."
"It is listening now," the mirror said.
The Way Forward
She walked the corridors for hours. In at least four of the branches she was running. In one she was carrying a sidearm she did not remember drawing. The ship was humming at a frequency just slightly below what her ears registered, and the hum was regular, and the regularity felt, in some way she could not explain, like a heartbeat that was not her own.
At the junction outside Engineering she met a second Observer walking the other way. Both of them stopped. Neither of them spoke. It was not an unfriendly meeting. They nodded to one another, once, and continued in opposite directions.
Somewhere on the ship, she understood, an Observer was already at the center of the spiral. Another was still at its outer edge. Between them, fifteen more were walking, and each step any of them took was a step taken by all.
She would meet herself at the center. All seventeen of her would. And one of them would choose.
She hoped it would be the one who still remembered why she had joined the ship in the first place. She hoped it would not be the one from the branch where they had betrayed the Captain.
She did not hope she would remember which was which.
The anomaly, patient, recorded the seventeen pairs of footsteps and folded them neatly into its own strange time. Somewhere ahead of her, somewhere behind, and somewhere exactly where she was standing, a door was opening.