The Coordinates You Happen to Have

Four people interviewed someone on a Thursday. I'll call them Ari. Ari isn't a real person, and neither are the four, but I've sat in enough of these rooms that you'll recognize all five of them. If you've ever hired, or been hired, this is your room too.

Here's what the four of them said. The engineer, who ran the systems design hour, said Ari was careful: slow to commit to an approach, fast to name what would break it. The manager said Ari was warm and a little deferential, and wondered out loud whether they'd push back on a bad decision from someone senior. The person who ran the values conversation said Ari was the most curious candidate they'd met all quarter, and told a story about a question Ari asked that wasn't on anyone's list. The founder, who had twenty minutes at the end of a long day, said Ari seemed fine.

On Friday they sat in a room to decide. And the room did what rooms do. It went looking for the overlap.

You know how that meeting goes, because you've been in it. Somebody puts the four readings on a whiteboard. Somebody says *careful* and *deferential* might be the same thing seen from two chairs. The manager's worry becomes a line item, and the values interviewer's story becomes a nice anecdote, because a story one person tells isn't evidence and a worry two people share is. By the end there's a number, and the number is one everybody in the room can live with. That's the point of the meeting. It's what a debrief is for.

Here's the claim, and I'll put it in the form the most skeptical person in this room would grant, because I'd rather earn it than assert it. Nothing in those four accounts contradicts anything in the other three. Careful and warm and curious and fine can all be true of one person on one Thursday. The room treated them as four noisy readings of one quantity and reached for the signal they had in common. But they weren't four noisy readings of one thing. They were four clean measurements of four different things. And when you take what four clean measurements of different things have in common, you don't get more. You get less. A debrief doesn't add the views together. It intersects them, and the intersection is smaller than what any one person walked in with. Keep Friday in your pocket. We'll come back to it with something to do.

That's the whole talk, in one line: they weren't looking at the same thing badly. They were looking at different things well. The next twenty minutes are about why that's not a figure of speech.

Stand a soup can on a table under a lamp and look at the shadow on the floor. A circle. Move the lamp to the side and put a wall behind the can. A rectangle. Both shadows are correct. Neither one is a distortion of the other. And you could study the circle for a year and never get the rectangle back out of it.

The word for what the lamp is doing is projection, and it's worth being exact about the kind of damage a projection does, because the ordinary intuition is wrong. A projection isn't a blurry photograph. Looking down from above, the height of the can isn't recorded badly. It isn't recorded at all. The circle is a complete and exact description of the can along every direction the circle has. It's missing a direction, and a missing direction leaves nothing behind. No gap. No error bar. No smudge where the height used to be.

That's why you can't work backwards. Given the circle, the can is one of infinitely many objects that would cast it, and they're not near-misses of each other. A cylinder, a cone, a sphere, a stack of coins, and a wobbling spiral all put down the same disc. The circle rules out everything that isn't round from above, and then it stops.

Now, the objection some of you have ready, and it's a good one. People are describable. A whole field has spent decades describing them: it names the directions people differ along, measures them with a questionnaire, and predicts from the measurements. Anyone who tells you personality can't be measured has confused hard with impossible, and is usually protecting something. So take all of it as given.

Then notice what a trait is. A trait is a direction enough people varied along that somebody found it worth naming. That's not a criticism. It's the definition, and it's also the filter. An axis that shows up in three people can't be validated, and an axis that shows up in one person isn't a trait. It's a person. And you are not hiring a population. The things that decide what Ari does on a Tuesday in March, when the project is failing and the person who'd normally catch it is on leave, are exactly the directions that were too rare to survive that filter.

A trait is what's left of a person after you remove everything that didn't generalize. That's a useful object. It isn't the person, and what got removed isn't noise.

So where do your coordinates come from? Not from the model. Almost nobody reads a stranger by running an inventory. You read them with the only instrument you have, which is everyone you've met up to now.

Every direction you can see a person along was put there by somebody earlier. You've known someone who went quiet under pressure, so *goes quiet under pressure* is an axis you have, and you can place a new person on it inside a week. You've known someone whose competence and confidence came apart, someone who was good and didn't know it, so you have that axis too, and you'll catch it in a stranger in one meeting.

If you haven't, you won't. And here's the part that matters. The missing quality doesn't arrive as a blank. It doesn't arrive as a question, or as something you notice you can't read. It lands on some axis you *do* have and gets recorded as something else. The person who's good and doesn't know it reads as unambitious, if unambitious is an axis you carry and *quiet about being good* isn't. Nothing in the experience feels like a gap. You just met someone unambitious.

Go back to the manager, who read Ari as a little deferential. The manager has that axis because of somebody four years ago: a report who was pleasant in every meeting, agreed in the room, and let two bad decisions go through without saying a word, and it cost the manager a quarter. That report installed the axis. Ari, who had been in the building for forty-five minutes and was being polite the way anyone is polite in a building they've been in for forty-five minutes, got a reading on it.

Here's the picture of that. The orange arrow is Ari, the whole person, pointing somewhere in a space with more directions than anyone in the building has coordinates for. The flat plane is the directions the manager has. The steep one is the directions the engineer has. Drop Ari straight down onto the manager's plane and you get one dot: that's who the manager met. Drop Ari onto the engineer's plane and you get a different dot, somewhere else: that's who the engineer met. Two planes, two dots, one arrow. And neither dot is the worse reading. Each one is all of Ari, along the directions that observer happens to have.

Now the part that makes this worse than the shadow. Having dropped the directions it has no coordinates for, the instrument does not hand back a partial picture with holes in it and a note about what it couldn't see. It extrapolates, freely and confidently, inside the space it kept. It fills in what a person like that would probably do in a meeting it never saw. It extends them past anything it observed. It checks the result for consistency and finds it consistent, because a picture built out of a few axes is going to be consistent along those few axes.

So the manager doesn't leave the room thinking *I have no information about whether Ari pushes back.* The manager leaves the room worried that Ari won't. That's not a gap. That's a whole person: coherent, specific, predictive, arrived at honestly, and assembled out of coordinates that came from a different human being in a different building four years ago. The projection is never blank. That's exactly why it's never suspected.

You know the parable. Blind men meet an elephant. One has the trunk and says snake, one has the leg and says tree, one has the ear and says fan. It's told as a lesson in humility, and it always ends the same way: compare notes, and the elephant comes back.

The geometry says it doesn't. And I want to be careful here, because some of you combine measurements from different instruments for a living, and you're right that it can be done. Combining two projections is routine when you know the two operators: which directions each observer was reading along, so you can put their coordinates into one frame. Give me both operators and I'll give you back everything the two of them saw between them. Granted, completely.

You don't have your own operator, and neither do I. It isn't written down anywhere. It isn't in anyone's head as a thing to consult. And it isn't introspectible, because it isn't a belief. It's the accumulated residue of every person you've ever known, doing its work before anything reaches you as an impression. The manager can tell you Ari seemed deferential. The manager cannot tell you that *deferential* is an axis a specific person installed four years ago, because that's not what it feels like from the inside. From the inside it feels like a property of Ari.

So *snake* and *tree* aren't two partial answers to one question. They're two answers to different questions, written in two private languages, and laying them side by side doesn't add them. What survives contact between them is only what the observers already share.

Same scene, arrow gone. The flat plane is what the manager can see. The steep plane is what the engineer can see. Each of them is two-dimensional. And where two planes meet, they meet in a line. Not in a richer surface. In a line, which has one dimension, fewer than either observer walked in with. That orange line is what the two of them can agree on. That's not a quirk of the drawing. It's what happens when you intersect, and it goes the same way with four observers as with two.

Watch it happen. One observer. What they can agree on is everything that one person can see: the whole plane.

Two observers. A line.

Three. In three dimensions, three planes that don't happen to share a line meet at a single point. The origin. Almost nothing.

Four. Still a point. A fifth interviewer can't make the shared space larger. They can only hold it where it is, or shrink it. And a real person has a great many more directions than three, so the real intersection isn't a point. It's whatever coarse directions every observer's history happened to install, the ones common enough that all four of them have them.

One more thing, and it's the uncomfortable one. Each of those four reports was extrapolated before it reached the room. So the thing four people agree on isn't reliably something any of them saw. Four people can converge on a direction none of them observed, and the process that produces it is called building consensus, and from inside the room it feels exactly like converging on the truth.

The one interviewer who saw something nobody else saw was carrying the only new information in the building. And the meeting is designed to discard exactly that, because a reading nobody can corroborate is, by the room's own standards, the definition of a weak signal.

Four interviewers don't give you a four-times-richer person. They give you the intersection. And the intersection is smaller than any one of them.

One frame before Friday, and it isn't mine. Some of you saw the last talk, and you'll recognize it. Iain McGilchrist, a psychiatrist who taught literature at Oxford before he trained in medicine, published *The Master and His Emissary* in 2009 with Yale University Press. He describes two ways of attending to the world that we need both of. One takes a thing out of its context, holds it still, breaks it into parts, and re-presents it, presents it again, as a model it can work with. The other attends to the whole, alive, in context, and to what's between things. The first he calls the emissary. The second, the master. The emissary is enormously capable and was never meant to be in charge.

The dimensional reading of that is mine, not his; he's writing about kinds of attention, not about rank. But it's hard to unsee. To re-present something is to render it in some fixed set of categories, because that's what representing is. Whatever can hand you a model has already chosen a basis. And the faculty that attends to the whole person doesn't have that limit, and also can't hand you anything, because the moment you write it down it's been re-presented, in coordinates, by the other one. That's the bind. The part of you that met Ari can't file a report. The part of you that files the report never met them.

So, Friday. None of this recovers a deleted direction. I don't have a method for seeing what you have no axis for, and I'd distrust anyone selling one. What's available is narrower, and it's still worth having. Three things.

Stop converging. The output of a debrief should be the union of what four people observed, kept in their own words, not a number four people can live with. When an interviewer says something the others can't corroborate, that's the sentence to write down verbatim, not the one to discount. An uncorroborated observation is expensive information, because it's the only kind the room can't manufacture.

Vary the room. A setting doesn't display a person. It excites part of them and leaves the rest at rest. A systems design hour reaches for how somebody thinks when they don't know the answer yet, and it has no way to reach for how they behave when a colleague is struggling, because nothing in the hour puts a struggling colleague in front of them. That's why the two people who know you best can describe you in ways that don't overlap, without either of them being fooled. So a second conversation in the same room isn't a second reading. It's the same projection sampled twice, and it will feel like confirmation. If a second reading matters, it has to come from a setting that excites different directions: a working session instead of a fourth conversation, a problem with a person in it and not only a system.

Ask who taught you the axis. This is the closest thing there is to reading your own operator, and it takes about ten seconds. Before you commit to a judgment about somebody, name the earlier person it came from. Sometimes there isn't one, and the reading stands. Often there is, and they're standing in the room wearing the candidate's face.

Ari got an offer, eventually, after a fifth conversation that somebody scheduled because the room couldn't agree. It went well. Everyone said afterward that the debrief had worked.

Four people met Ari on Thursday, and four different people walked out of those rooms. The fifth, careful and warm and curious and fine, the one they finally agreed on, the one the offer was written for, is the only one who was never in the building.