@aiwithmayank: Adam Grant is a Wharton psycho...
@aiwithmayank
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Jun 08, 2026
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Adam Grant is a Wharton psychologist who proved the most confident people are often the most wrong.
He revealed 10 thinking habits that keep smart people stuck in bad ideas.
1) Defending an opinion you formed years ago
He revealed 10 thinking habits that keep smart people stuck in bad ideas.
1) Defending an opinion you formed years ago
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Most people treat opinions like possessions.
You formed a view about something years ago. You repeated it. You built an identity around it. Now someone challenges it and the challenge feels like an attack on the person, not a test of the idea.
Grant spent years studying what he calls the rethinking gap. The gap between how often we update our beliefs and how often the evidence warrants it.
The gap is enormous. Most people cross it almost never.
The opinion you formed at 22 with a fraction of your current information is being defended at 35 with the full force of your ego.
The information changed. The belief did not. You just got better at arguing for it.
You formed a view about something years ago. You repeated it. You built an identity around it. Now someone challenges it and the challenge feels like an attack on the person, not a test of the idea.
Grant spent years studying what he calls the rethinking gap. The gap between how often we update our beliefs and how often the evidence warrants it.
The gap is enormous. Most people cross it almost never.
The opinion you formed at 22 with a fraction of your current information is being defended at 35 with the full force of your ego.
The information changed. The belief did not. You just got better at arguing for it.
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2) Treating intelligence as armor instead of a tool.
Grant found that smart people are not better at reasoning their way to truth. They are better at reasoning their way to whatever conclusion protects their existing beliefs.
He calls this the intelligence trap. The smarter you are, the more sophisticated the defense you can construct around an idea that deserves to be abandoned.
You do not just dismiss the counterargument. You dismantle it. You find the weakest version of the opposing view and destroy that instead. You walk away feeling more certain than you were before.
The intelligence did not help you think better. It helped you feel better about thinking the same.
Grant found that smart people are not better at reasoning their way to truth. They are better at reasoning their way to whatever conclusion protects their existing beliefs.
He calls this the intelligence trap. The smarter you are, the more sophisticated the defense you can construct around an idea that deserves to be abandoned.
You do not just dismiss the counterargument. You dismantle it. You find the weakest version of the opposing view and destroy that instead. You walk away feeling more certain than you were before.
The intelligence did not help you think better. It helped you feel better about thinking the same.
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3) Confusing being right with being consistent.
There is a social norm so embedded in professional life that almost nobody examines it.
Changing your mind is treated as weakness. Holding your position under pressure is treated as conviction. Leaders who reverse course get called indecisive. Scientists who update their models get accused of not knowing what they believe.
Grant's argument is that this norm has the logic exactly backward.
Updating your beliefs when evidence changes is not inconsistency. It is the definition of a working mind. The person who holds the same view under every new piece of evidence is not convicted. They are stuck.
Consistency is only a virtue when the evidence stopped moving. It almost never stops moving.
There is a social norm so embedded in professional life that almost nobody examines it.
Changing your mind is treated as weakness. Holding your position under pressure is treated as conviction. Leaders who reverse course get called indecisive. Scientists who update their models get accused of not knowing what they believe.
Grant's argument is that this norm has the logic exactly backward.
Updating your beliefs when evidence changes is not inconsistency. It is the definition of a working mind. The person who holds the same view under every new piece of evidence is not convicted. They are stuck.
Consistency is only a virtue when the evidence stopped moving. It almost never stops moving.
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4) Surrounding yourself with people who already agree.
Grant calls this the echo chamber problem, but his version of it cuts deeper than the standard social media version.
The echo chamber you need to worry about is not just your Twitter feed. It is your team, your closest advisors, your best friends. The people who have watched you form your beliefs and absorbed most of them.
When you bring a bad idea to people who like you, they find the parts of it that work. When you bring a bad idea to someone who has no stake in your being right, they find the parts that do not.
The feedback that makes you uncomfortable is almost always more valuable than the feedback that makes you feel understood.
Seeking it out anyway is a skill. Almost nobody builds it on purpose.
Grant calls this the echo chamber problem, but his version of it cuts deeper than the standard social media version.
The echo chamber you need to worry about is not just your Twitter feed. It is your team, your closest advisors, your best friends. The people who have watched you form your beliefs and absorbed most of them.
When you bring a bad idea to people who like you, they find the parts of it that work. When you bring a bad idea to someone who has no stake in your being right, they find the parts that do not.
The feedback that makes you uncomfortable is almost always more valuable than the feedback that makes you feel understood.
Seeking it out anyway is a skill. Almost nobody builds it on purpose.
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5) Arguing to win instead of arguing to learn.
Grant draws a precise distinction between three mindsets most people blur together.
A preacher defends what they already believe. A prosecutor attacks what the other person believes. A politician reads the room and says whatever keeps the audience on side.
None of these mindsets are designed to find out whether the idea is actually correct.
The scientist asks a different question. Not can I defend this? But what would prove me wrong, and does that evidence exist?
Most people enter disagreements as preachers or prosecutors. Grant's research shows they exit those disagreements more confident and no more accurate than when they walked in.
Grant draws a precise distinction between three mindsets most people blur together.
A preacher defends what they already believe. A prosecutor attacks what the other person believes. A politician reads the room and says whatever keeps the audience on side.
None of these mindsets are designed to find out whether the idea is actually correct.
The scientist asks a different question. Not can I defend this? But what would prove me wrong, and does that evidence exist?
Most people enter disagreements as preachers or prosecutors. Grant's research shows they exit those disagreements more confident and no more accurate than when they walked in.
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6) Measuring how much you know instead of how much you do not.
The Dunning-Kruger effect is frequently misunderstood. People treat it as a story about incompetent people who think they are great.
Grant's version is more uncomfortable. It is a story about all of us, operating in every domain where our knowledge is incomplete, which is most domains most of the time.
The people who perform best on hard judgment tasks are consistently the ones who start by listing what they are uncertain about. Not what they know. What they do not know and what they would need in order to know it.
That inventory is uncomfortable to make. It is also the only way to find the actual gap before the gap finds you.
The Dunning-Kruger effect is frequently misunderstood. People treat it as a story about incompetent people who think they are great.
Grant's version is more uncomfortable. It is a story about all of us, operating in every domain where our knowledge is incomplete, which is most domains most of the time.
The people who perform best on hard judgment tasks are consistently the ones who start by listing what they are uncertain about. Not what they know. What they do not know and what they would need in order to know it.
That inventory is uncomfortable to make. It is also the only way to find the actual gap before the gap finds you.
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7) Waiting for certainty before changing course.
Grant studied leaders who reversed decisions and found a consistent pattern in the ones who got it right.
They did not wait until the evidence was overwhelming. They set a threshold in advance: if I see X, I will change direction. Then they held themselves to it.
The leaders who waited for certainty almost always waited too long. By the time the evidence was undeniable, the cost of changing had compounded far beyond what an earlier update would have cost.
Certainty is a lagging indicator. It tells you what was true long before you acted on it.
The decision to update should happen at a threshold you set, not at the moment the defense becomes impossible.
Grant studied leaders who reversed decisions and found a consistent pattern in the ones who got it right.
They did not wait until the evidence was overwhelming. They set a threshold in advance: if I see X, I will change direction. Then they held themselves to it.
The leaders who waited for certainty almost always waited too long. By the time the evidence was undeniable, the cost of changing had compounded far beyond what an earlier update would have cost.
Certainty is a lagging indicator. It tells you what was true long before you acted on it.
The decision to update should happen at a threshold you set, not at the moment the defense becomes impossible.
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8) Taking credit for outcomes and blaming context for failures.
Grant documents this pattern extensively in his research on high performers and in Think Again.
When something goes well, the attribution is skill. When something goes badly, the attribution is circumstances, bad luck, or someone else's mistake.
The problem is not that people are dishonest. It is that this attribution pattern, run consistently over years, produces a completely distorted picture of what you are actually good at.
You cannot improve your decision-making if every bad decision gets filed under external causes.
The update requires the attribution. If the loss was your call, own the call. That is the only version of the story that gives you anything to work with.
Grant documents this pattern extensively in his research on high performers and in Think Again.
When something goes well, the attribution is skill. When something goes badly, the attribution is circumstances, bad luck, or someone else's mistake.
The problem is not that people are dishonest. It is that this attribution pattern, run consistently over years, produces a completely distorted picture of what you are actually good at.
You cannot improve your decision-making if every bad decision gets filed under external causes.
The update requires the attribution. If the loss was your call, own the call. That is the only version of the story that gives you anything to work with.
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9) Treating doubt as a problem to eliminate.
Grant's most counterintuitive finding is about confidence.
In study after study, the people who made the best judgments were not the most confident ones. They were the ones who held their views with what Grant calls confident humility. Certain enough to act. Uncertain enough to keep looking.
Doubt, in this framework, is not anxiety. It is a signal that your model of the situation is still open for revision. It is the thing that keeps you from locking in too early and missing information that would have changed the call.
The people who eliminate doubt fastest are not the clearest thinkers. They are the ones who stopped paying attention soonest.
Grant's most counterintuitive finding is about confidence.
In study after study, the people who made the best judgments were not the most confident ones. They were the ones who held their views with what Grant calls confident humility. Certain enough to act. Uncertain enough to keep looking.
Doubt, in this framework, is not anxiety. It is a signal that your model of the situation is still open for revision. It is the thing that keeps you from locking in too early and missing information that would have changed the call.
The people who eliminate doubt fastest are not the clearest thinkers. They are the ones who stopped paying attention soonest.
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10) Learning from experience without examining the decision.
This is the one Grant returns to most in Think Again, and it is the subtlest trap on the list.
Experience teaches you things. But what it teaches you depends entirely on what you look at.
If you look at the outcome, you learn whether things went well or badly. If you look at the decision process, you learn whether you reasoned well or poorly.
Those are not the same lesson.
A bad process can produce a good outcome. A good process can produce a bad outcome. If you only examine outcomes, you will repeat bad processes that got lucky and abandon good processes that got unlucky.
Grant calls this resulting. Judging the quality of a decision by what happened instead of by the quality of the reasoning that produced it.
Most people spend entire careers learning the wrong lesson from their own experience because they never separated the outcome from the process that generated it.
This is the one Grant returns to most in Think Again, and it is the subtlest trap on the list.
Experience teaches you things. But what it teaches you depends entirely on what you look at.
If you look at the outcome, you learn whether things went well or badly. If you look at the decision process, you learn whether you reasoned well or poorly.
Those are not the same lesson.
A bad process can produce a good outcome. A good process can produce a bad outcome. If you only examine outcomes, you will repeat bad processes that got lucky and abandon good processes that got unlucky.
Grant calls this resulting. Judging the quality of a decision by what happened instead of by the quality of the reasoning that produced it.
Most people spend entire careers learning the wrong lesson from their own experience because they never separated the outcome from the process that generated it.
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The single sentence from Think Again I have not been able to stop thinking about:
"The mark of a good argument is not that it confirms your prior beliefs. The mark is that it gives you something to think about after the conversation is over."
Grant wrote a whole book to say one thing clearly.
The goal is not to win. The goal is to end up with a more accurate picture of reality than you had when you started.
Every habit on this list is a way of protecting the old picture.
Get Think Again by Adam Grant. Read it the week you feel most certain about something.
That is exactly when you need it most.
"The mark of a good argument is not that it confirms your prior beliefs. The mark is that it gives you something to think about after the conversation is over."
Grant wrote a whole book to say one thing clearly.
The goal is not to win. The goal is to end up with a more accurate picture of reality than you had when you started.
Every habit on this list is a way of protecting the old picture.
Get Think Again by Adam Grant. Read it the week you feel most certain about something.
That is exactly when you need it most.
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Every day, there's a new AI breakthrough changing how people work and live.
We break it down in under 5 minutes a day, so you don't.
Plus, get 3,000+ AI tools and free AI courses when you join.
Subscribe👇 theshiftai.beehiiv.com/subscribe