You’ve had the experience where a conversation just works.
Ten minutes in and you’re finishing each other’s points. They get the thing you were half-saying before you’d finished saying it. You leave thinking: that’s a sharp person.
And you’ve had the other one. Someone perfectly competent, perfectly decent, and every exchange is uphill. You explain, they don’t quite land on it, they respond to something adjacent to what you meant. You leave slightly depleted and mildly convinced they’re not very good.
Both readings feel like judgements about the other person.
Neither one is.
What You’re Actually Measuring
The subjective experience of rapport is substantially produced by compatibility of communicative mode rather than by any property of the relationship. People operate predominantly in one register — leading with evidence, with outcomes, with relationship, or with precision — and when two people share a register, each receives the other’s meaning without conversion. The resulting low effort is experienced as understanding, insight, or natural connection. When registers differ, every exchange requires translation, and the effort of translating is experienced as the other person being unclear, slow, or difficult. Because the sensation is attributed to the relationship rather than to the mode mismatch, people systematically mistake communicative similarity for intellectual quality and interpersonal fit. This has a compounding effect: individuals preferentially build networks from people who share their register, which reduces the range of information reaching them over time.
Three consequences. The third is the expensive one.
One: Ease Is Not a Signal of Quality
Start here, because it’s the load-bearing claim.
When someone receives your meaning without conversion, you experience them as intelligent. That’s not a considered assessment — it’s an inference you make automatically, from the fact that comprehension was cheap.
But comprehension being cheap tells you about the match, not about them.
The person who found you effortless is running the same mode as you. The person who found you hard work isn’t. And you’ll rate the first as more capable, more insightful, and better to work with, on evidence that’s entirely about compatibility.
You can test this on yourself, and it’s slightly uncomfortable. Think of someone you find sharp and someone you find slow. Now ask: do other people share your assessment? Frequently they don’t, and frequently the split falls along lines you hadn’t noticed — the people who agree with you about the “slow” one tend to be people who communicate like you.
That’s not a coincidence. That’s the whole effect, visible.
Two: The Sensation Is Translation Cost
Second, and it’s worth being precise about what the difficulty actually is.
When registers mismatch, you’re doing conversion work on both sides of the exchange. You’re converting your meaning into a form they’ll take, badly and slowly, because you’ve never practised. And you’re converting their delivery into something you can use, also badly.
That conversion is genuinely effortful, and effort in a conversation registers as friction.
But friction has no label attached saying where it came from. So it gets assigned to the most available explanation, which is the other person — they’re being unclear, they’re overcomplicating it, they’re not getting to the point, they’re being political.
Sometimes they are. Usually you’re both paying a translation cost neither of you has named.
The tell that it’s mode rather than merit: the difficulty is symmetrical. They find you hard work too. If you’ve ever discovered that someone you consider vague thinks you’re the one who won’t get to the point, you’ve seen this directly.
There’s a fuller treatment of the four registers and how to read them in the room where half your words disappear.
Three: Your Network Is an Echo
Third, and this is the one with real consequences.
If ease predicts who you spend time with — and it does, strongly, because nobody deliberately seeks out conversations that feel like work — then over years you assemble a professional and personal circle disproportionately composed of people who share your mode.
Which means you’ve built an information system that returns your own format.
The people who make you feel understood are, structurally, the people least likely to hold something you don’t already have. Not because they’re less capable, but because a shared mode tends to come with shared framing, and shared framing means shared blind spots.
Which produces the claim worth taking from this piece:
The people you have no chemistry with are frequently the ones holding the information you’re missing.
Not always. Some people are just difficult. But the systematic version of this is real, and it explains a specific pattern: the warning that would have saved you eighteen months usually came from the colleague you found tiresome, in a form you discounted, and you remembered it afterwards.
You didn’t ignore it because you’re arrogant. You discounted it because it arrived in a mode you register as low quality.
What to Do With This
Three moves. None require you to enjoy anyone’s company more.
Reclassify friction. When an exchange is hard work, the first hypothesis should be mode mismatch rather than deficiency. That’s not generosity — it’s accuracy, and it changes what you do next. A deficiency prompts you to disengage. A mismatch prompts you to translate.
Keep at least two difficult people close. Deliberately. People whose mode differs from yours and who you’d naturally drift away from. Treat the effort as the price of information you can’t get from your own echo.
Stop using chemistry as a hiring or partnering signal. This one costs money if you get it wrong. Interviewing for rapport selects for people who communicate as you do, and a team assembled that way will be pleasant, cohesive, and blind in exactly the same places. If you notice you’re hiring people you “clicked with,” you’re likely measuring similarity and calling it fit.
The two-thousand-year-old version of this instruction is unsentimental about it: different people require different things from you, the requirement is a property of them rather than a flaw, and the skilled operator adapts rather than sorting people into the ones who get it and the ones who don’t. The nine types are here.
What This Is Not
It is not a claim that all rapport is illusory. Genuine affinity exists — shared values, shared humour, actual affection. Mode compatibility is one component and it’s a large one, but it isn’t the whole of liking someone. The argument is that it’s routinely mistaken for the whole.
It is not an argument that everyone is equally capable. People differ substantially in judgement, rigour, and competence, and some of the people you find difficult are difficult because they’re not very good. The claim is narrower: your immediate sense of someone’s quality is contaminated by mode match, so it’s an unreliable instrument on its own.
It is not an instruction to endure genuinely bad behaviour. Someone who’s evasive, dishonest, or hostile isn’t a register mismatch, and reframing them as one is a mistake in the other direction. The test is whether the difficulty is about how the meaning travels or about what’s actually being done.
The Cost
Two prices, and the first is more annoying than it sounds.
You have to keep working with people you find tiring.
Right now you have a legitimate-feeling reason to reduce contact with certain colleagues: you don’t work well together, the chemistry isn’t there, it’s inefficient. That reason has been quietly shaping your calendar for years.
Take this seriously and that reason dissolves. The difficult exchanges become something to invest in rather than route around, and the investment is genuinely costly — those conversations take longer, produce less per minute, and leave you flatter.
The return is real and it’s delayed, which is the worst combination for actually doing something.
Second: you have to stop trusting the feeling of being understood.
That feeling is one of the more reliable pleasures available in professional life, and it’s been functioning as evidence — evidence that you’re on the right track, that this person is worth listening to, that the collaboration is working.
It isn’t evidence of any of that. It’s evidence of format compatibility, which is a much smaller claim, and demoting it costs you something you’d been relying on.
Common Questions
Why do I get on effortlessly with some people and not others?
Largely because of communicative mode. People lead predominantly with evidence, outcomes, relationship, or precision, and when two people share a mode, meaning transfers without conversion. The resulting low effort is experienced as understanding and connection.
What causes instant rapport?
Low translation cost. When someone receives your meaning in the form you deliver it, comprehension is cheap, and cheap comprehension registers subjectively as insight or affinity. It’s a real experience with a mundane cause.
Why do I find certain people difficult for no apparent reason?
Because you’re both paying a conversion cost that neither of you has named, and the resulting friction gets attributed to the other person rather than to the mismatch. A useful check: they usually find you difficult too, which is inconsistent with the difficulty being a property of one of you.
Is chemistry a good signal for hiring or partnering?
It’s a poor one used alone, because it substantially measures similarity of communication rather than quality or fit. Teams assembled on rapport tend to be cohesive and to share blind spots.
Does this mean everyone I find slow is actually capable?
No. Real differences in competence exist and some people are genuinely not good. The claim is that your immediate impression is contaminated by mode match, so it needs corroboration from something other than how the conversation felt.
How do I work with someone whose mode differs from mine?
Lead with theirs rather than yours for the first minute or two, and treat their first substantive question as the signal for which mode they’re in. The adjustment is small and it removes most of the friction.
Where to Start
One person. This week.
Pick the colleague you find hardest work — not the one you dislike, the one where every exchange is uphill for no reason you can name.
Then do two things.
Write down what they lead with. Listen to their first substantive question in your next conversation. How do we know that? is evidence. What does this get us? is outcome. Who else is involved? is relationship. What exactly do you mean by that? is precision.
Then write down what you lead with. Same list, one word.
If they’re different words — and they will be — you’ve just found the entire content of what you’ve been experiencing as a personality problem for however long you’ve worked together.
Then, in the next exchange, open with theirs. Only the opening. Leave everything else the same.
Most people find the difference immediate and slightly deflating, because a relationship they’d characterised in terms of temperament turns out to have been a formatting issue.
I’ve spent twenty-five years working on how ordinary people develop capabilities that look impossible from the outside, and the people who consistently know things before everyone else aren’t better connected.
They’re connected to a wider range of modes, usually because at some point they stopped organising their contacts by who was easy to talk to.