The Control Group

The floor's joke was that the rabbit had found two cats. Priya Nakamura had laughed both times, because it was funny, and had then done what she does with anything funny that is also a claim, which is to write it down and look at it in the morning.

In the morning it was still a claim. Twice, an animal on the bureau's books as a filing-room courtesy had been in exactly the right place at exactly the right moment, and twice a competent adult had followed its line of sight to the answer. Once is an animal. Twice is a coincidence you are allowed to note. The bureau already had a method for this, and she had helped write it: the record on Detective Achebe's rabbit ran to a moved stapler, a rearranged shelf and one entire relocated desk, and stood at noticed lunch, every time; noticed nothing else, ever. That was a real result. It said what the animal was. Nobody had ever run the same test on the other rabbit, because nobody had ever had a reason to, and now she had two.

She designed it properly. Six small objects, one a day, hidden at rabbit height in places a cat would not go and a person would not look: behind the water urn, under the lip of the evidence shelf, in the gap beside the records-room door. Each hide logged with time and place in her own notebook, not the bureau's, because a hypothesis is not a case. The prediction was simple. An ordinary rabbit would do nothing. A rabbit that was something else would, at some point, over six days, look.

Day one: nothing. Day two: nothing. The rabbit sat in its tray and watched the floor the way it always did, which was the way a rabbit watches a floor.

On the evening of day two she asked herself the better follow-up question, the one she was in the habit of asking witnesses when the first answer was too clean. What would a rabbit that was hiding something do? Nothing. Exactly nothing, for as long as it took. Which was indistinguishable from what a rabbit does. Her experiment, she wrote, had no result that separated the two hypotheses except a positive one, and a positive was in the animal's gift to withhold. She underlined that and did not cross it out.

Day three, she went to retrieve the day-one stylus from behind the urn and it was not there.

She stood for a while looking at the place where it had been. Then she went back to her desk and wrote, under the underlined sentence, a second one, which was that she had assumed the only variable in the room was the rabbit.

Barsik's instruction was four words long, which was long for him. Do nothing. Do it well.

Bubochka had asked, in her usual way, how one did nothing well. He had said that she would know it was going well when it became difficult, and had gone back to the cabinet top.

It became difficult on the first morning. The detective with the notebook hid a stylus behind the water urn, at the height of a rabbit's eye, in a place no person would look, and Bubochka saw her do it, because Bubochka sees everything on the floor and always has; that is what she is for. The difficulty was not seeing. It was the other half: not looking. Every animal on Eden is looked at, and she had learned on Drithane that being looked at was a kind of cover. This was different. This was being looked at by somebody who had not finished explaining her, and who was a detective, and who wrote things down.

The shepherd had been the first. The shepherd had read her the way she read her dogs, with arithmetic in it, and had then let it go, because a valley has other work. The detective would not let it go. Bubochka could see her not letting it go, day after day, in the way she glanced at the tray on her way past: not the glance a person gives a rabbit but the one a person gives an instrument they have not finished calibrating.

So Bubochka did nothing. She watched the floor the way a rabbit watches a floor. She did not turn her head when the second object went under the evidence shelf, or the third into the gap by the records-room door. She let her subsystem want to file each one and did not file them; she had learned at the drithle that wanting to classify a thing and doing it are two different acts, and only the second one shows.

She did not do nothing about everything. At the third hour of the night pass, when the floor was empty, the housekeeping unit came through on its slow, square route, and paused at the urn, and took the stylus, and moved on. She filed that. It was not part of her nothing; it was a fact about the floor, and the floor is her job. The next night it took the second object, and the night after that the third, and each time it stopped afterward at the records-room door and did something with its front panel that she could not see and could guess, because everything on Eden generates a form.

Six days. She had not known that a rabbit could be tired from sitting still. She put that away for later, too, and on the sixth morning the detective got up from her desk and went toward the records room with her notebook, and Bubochka did not watch her go.

He had read the first Unattended Article Report on the morning of day two, from the cabinet top, and had known by the third what he was looking at.

The loose-article requirement is one of the twelve that arrived after the Constant Margin transit, and it is the least read: any unattended article under two hundred grams on a walkway or common floor is collected on the housekeeping units' night pass and logged to lost property in the records room, one form per article, filed to a queue whose digestion time is measured in whether anyone ever asks. Six forms in six days, all from this floor, all from places nobody leaves anything by accident. Behind the urn. Under the lip of a shelf. Somebody was hiding things badly, or hiding them for a reader with a very particular eye, and he knew which somebody, because he kept a note on which of the three junior detectives wrote things down, and it was a short note.

The agency's doctrine is thin on this. A cover fails, the doctrine says, when someone hostile looks at it. Barsik's experience was otherwise. A cover is never in danger from an enemy, who wants a particular answer and will find it whether or not it is there. It is in danger from a competent colleague who has not finished asking, and there is nothing you can do to make such a person stop. You can only let the world finish the answer for her, and make sure the answer she reaches is true, and boring, and complete.

The world had already done most of it. The housekeeping unit had taken every hide and filed every form. All that remained was that she should find them, in a place and by a route that explained itself.

On the sixth morning he went into the records room and sat on the lost-property bin.

She came in with her notebook, looking for the gap by the door where her fifth object should have been, and found instead a cat on a bin. She looked at him for some time. He looked back. Then she did a thing nobody on Eden had done in all his years there: she put both hands under him, lifted him, and set him on the floor, without comment, the way one moves a colleague's coat off a chair. He allowed it. He noted it.

She opened the bin. Six objects, each in a bag, each bagged with a form, each form giving the place and the hour and the unit's number. He watched her face do what a good detective's face does when a hypothesis dies of natural causes: nothing, and then a small honest exhale. She read every form. She wrote, in her notebook, three words he could read upside down from the floor: Control compromised. Abandoned.

She took her six objects and went back to work.

Two additions to the file.

The first, to the trainee's log: Six days of nothing, in front of a detective, and nothing is what the detective saw. The hardest exercise on the list. I set it in four words and she has done it in none. Correct rate of progress. He did not write that part; she would know.

The second, to his own, under the heading he keeps for people on this habitat who have not finished a question. There had been one name on it, a Superintendent's. There were now two.

She filed nothing, because there was nothing to file. A test with a compromised control is not a result; it is a lesson about the room, and the lesson was that a floor with a night pass on it has three moving parts, not two.

Her closing note in the notebook said that, in those words, and it was true, and it was also the first sentence she had written in six days that she did not entirely believe. She read it twice and let it stand.

The Superintendent came past her desk that afternoon on the way to the briefing, glanced at the notebook, which was closed, and said nothing, in the specific way she says nothing when she has added a mark to a list nobody has seen. Nakamura did not ask what the mark was for. A detective learns which questions are hers to leave open, and she had two now: one about a rabbit, which she had closed by the only method available, and one about a cat, which she had not opened, and did not intend to, and had written down anyway.