A few years ago, I made a decision in a meeting, and every person in the room agreed with me.

I remember feeling good about it. Clear direction, no friction, everyone aligned. It felt like leadership working.

It was the wrong decision. Two of the people in that room had already seen why, and neither of them said so.

When I asked one of them afterwards why he had stayed quiet, he did not say he was afraid of me. He said something worse. He said it did not seem worth it.

I have thought about that sentence for years, because it was not a complaint about that meeting. It was a summary of every meeting before it.

Nobody tells a senior leader they are wrong by accident. It has to be actively made safe, deliberately and repeatedly, and even then it happens less than you think.

What replaces disagreement is not silence, which you would notice. It is agreement. Warm, professional, entirely convincing agreement, offered by capable people who privately believe you are making a mistake.

The higher you rise, the more of this you receive, and the better it feels. That is precisely the trap. The absence of challenge is indistinguishable, from the inside, from the presence of consensus.

And the cost compounds. A leader who is not challenged does not simply make one bad decision. They lose the mechanism that would have caught it, so the next one goes unchallenged too, and the one after that, until a whole strategy has been built without a single serious objection ever being voiced.

None of these three looks like a problem from where you sit. They look like a capable team that agrees with you.

In medicine, we assume the first opinion may be wrong. This is not an insult to the clinician. It is a design principle, built into how the work is done.

So we build in the second opinion. We ask a colleague to look again, especially when we are confident. We run a differential, a deliberate list of everything else this could plausibly be, before committing to the obvious answer. And we have a name for the specific failure this prevents. Diagnostic overshadowing, where one prominent explanation is so satisfying that nobody looks for the real one underneath it.

The second opinion does not exist because doctors are bad at diagnosis. It exists because confident people miss things, and because the more confident the person, the more expensive the miss becomes and the less likely anyone is to question it.

Most organisations have no equivalent. No differential. No colleague formally asked to look again. Just a senior person who was sure, and a room that agreed.

1. When did someone last tell you plainly that you were wrong, and what happened to them afterwards?

The second half of that question matters more than the first. People watch what happens to the last person who spoke up, and they calibrate accordingly.

2. Do you state your view first, or last?

If you go first, you are not chairing a discussion. You are announcing a conclusion and collecting agreement, however genuinely you intended otherwise.

3. Can you name the person who most often disagrees with you?

If no name comes quickly, that is not because your judgment has become unusually good. It is because the challenge has stopped, and you did not notice it stopping.

Take your last five significant decisions.

For each one, write down who disagreed, what they said, and what you did with it.

Then look at the pattern rather than the individual cases. If the same one or two names appear every time, your organisation has outsourced all of its challenge to a small number of brave people, and you should protect them deliberately, because that role is exhausting and usually unrewarded.

If no names appear at all, you do not have alignment. You have a diagnostic system that has quietly stopped working, and the next serious mistake will arrive without warning.

Then change one thing this week. Before your next significant decision, name the person most likely to disagree and ask them first, before you have stated your own view. And ask the room a different question. Not "does everyone agree," which invites a nod, but "what would have to be true for this to be the wrong call," which invites a differential.

A chief executive with a strong, capable executive team, and a strategy that had not been meaningfully challenged in two years. Every proposal passed. Every meeting ended in alignment. Board papers went through without amendment.

She read all of this as evidence that she had finally built the right team. It was the opposite, and by the time the market told her, the cost of the correction had trebled.

The presenting symptom was a leadership team that always agreed. The real diagnosis was manufactured consensus, and it had a traceable origin.

The full case, the diagnosis, and the prescription are inside The Diagnosis Room.

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Last week on LinkedIn, I touched on staying long in an organisation.

The people who leave every two years often collect breadth but sacrifice depth. They can adapt quickly, but they rarely stay long enough to shape the culture or leave a lasting legacy.

The people who stay for decades often collect depth but lose optionality. They become woven into the fabric of an organisation that, one day, will inevitably learn to continue without them.

Read the post and join the conversation here.

Think Again, Adam Grant.

The argument that the most valuable capability for a senior leader is not conviction but the willingness to rethink. The line that stays with me is the simplest one: being proved wrong early is far cheaper than being proved wrong late, and most organisations are structured to guarantee the opposite.

Find it here: https://amzn.to/4bNSlzx

The man in that meeting did not stay silent because he was intimidated. He stayed silent because disagreeing had never visibly been worth anything, to him or to anyone else who had tried it.

That was not his failure. It was mine, and it had been building quietly for months before the meeting where it finally cost me something.

A room that always agrees with you is not evidence that you are right. It is evidence that you have stopped being told.

Who in your organisation is still willing to tell you the truth, and what has it cost them lately?

Lead honestly. Lead clearly. Lead where it matters.

Dr Ikechukwu Okoh, The Leadership Diagnostician

New here? Start with MISDIAGNOSED, my free executive briefing on why smart leaders treat the wrong problem, and how to diagnose it before you act.

Forward this to one leader whose team agrees with them a little too easily.