I have sat in a lot of conversations that open the same way. A manager comes to HR with a people problem, and the story is already finished. They have examples. They have dates. They have a pattern they can walk you through without notes. What they usually cannot produce is anything from the last six months pointing the other way.

That is not dishonesty. The manager believes every word of it. The issue is that they stopped gathering evidence a while back and never realized it.

I talked about this recently with Nir Eyal, whose new book Beyond Belief is about the assumptions that quietly set the ceiling on what we think is possible. He defines a belief as a conviction that remains open to revision when new evidence emerges. That definition is useful for anyone running a team because it gives you a test. If a manager’s read on an employee is no longer open to revision, it has stopped being an assessment.

“Beliefs are tools, not truths.” – Nir Eyal

The distinction matters more at work than most people give it credit for. Nobody in your company is walking around with a formal file on anyone. What they have is a read. And the read is doing all the work.

How a read turns into a verdict

It rarely starts with anything dramatic. Someone misses a deadline in their second week. Someone gives a rough presentation and gets defensive in the debrief. Someone goes quiet in a meeting where the manager wanted them to speak up. A read forms, usually in under a minute, and usually without the manager deciding to form one.

Then confirmation bias goes to work. Nir uses the example of Jim from accounting. Once you have decided Jim is unreliable, you stop registering the mornings he was early. Those go in the bucket marked normal. The mornings he was late, go in the bucket marked “Jim.” You are not being unfair on purpose. Your attention was set to a filter, and it is finding what it was set to find.

At a large company, this gets diluted. People move teams. New managers arrive with no history. Someone gets a second reader.

At a 40-person company, there is no dilution. One manager’s read is the company’s read. If the person who runs operations has decided you have hit your ceiling, you have hit your ceiling, because there is no second operations leader who might see it differently. This is one of the real structural risks of small and mid-sized organizations, and it does not show up in any dashboard.

The part that costs you money

Here is what I have seen over and over. The employee knows.

They cannot always name it. But they can feel that the ceiling arrived, and they can usually tell you the month it showed up. So they stop volunteering for the stretch assignment. They stop floating the half-formed idea. They give exactly what the job requires and no more, which is a reasonable response to a situation where extra effort has stopped producing a return.

The manager reads that as confirmation. He has checked out. See, I was right.

Then the person leaves, and the manager files the departure as more evidence for the original read. The one thing that would have corrected the belief, someone credible telling the manager they were wrong, never happens. Good people almost never argue on the way out. They just go.

Reversing it on purpose

None of this fixes itself with awareness alone. Every manager reading this already agrees that confirmation bias is real and will still walk into their next one-on-one with a filter running. So the interventions have to be mechanical.

Date the decision. When a manager brings you a finished story about an employee, ask when they landed on it. If the answer traces back to a single incident more than a quarter ago, you are looking at a belief that has been accumulating supporting evidence ever since. That is worth saying out loud, gently, before the conversation goes any further.

Ask what would falsify it. The question is simple. What would this person have to do for you to conclude you had them wrong? If the manager cannot answer, the read has already hardened past the point where new information can reach it. If they can answer, you now have something specific to go look for.

Borrow the reality log. Nir describes this practice for people whose belief about their own performance has gone lopsided, usually after one piece of hard feedback. You write down what actually happened, including the parts that went well, because the brain will otherwise keep only the lowlights. The same tool works pointed outward. Two weeks of writing down what the person actually did in both columns will not always change a manager’s mind. It will tell you whether the record supports the story.

Tell the person. Most of the beliefs a manager holds about an employee are never communicated to that employee in any usable form. They get softened into review language or left out entirely. Nobody can revise a belief they have never been told about, which means the employee is often the only person in the building who could correct the record and the only one not invited to.

There is a version of this that runs forward in time, too. A manager schedules a hard conversation for Thursday and decides on Tuesday how it will go. By Thursday, they walk in braced, clipped, a little defensive before anyone has said anything. The employee matches that energy, because people match what they are handed. The conversation goes exactly as forecast, and the forecast gets counted as accurate.

Where HR sits in this

In a company of 40 or 200, you are frequently the only outside mirror in the building. There is no other department the manager will hear this from, and no peer who will risk saying it.

That makes the finished story worth pushing on, not because the manager is usually wrong, and not to advocate for the employee. Plenty of the time, the read is correct, and the documentation is real. But a read that no longer has any conditions under which it could change has stopped functioning as a performance assessment and started functioning as a fact, and facts are not something an employee gets to appeal.

Brandon Laws is the host of Transform Your Workplace and the VP of Marketing and Product at Xenium HR, an outsourced HR and payroll partner for small and mid-sized businesses in Portland, Oregon.