Think Again: the art of changing your mind
Introduction
We cling to our opinions. We defend them as if they were part of our identity, and changing our mind feels like a defeat or a sign of inconsistency. Yet in a fast-changing world, the ability to rethink — to revisit what we believe and update it — is one of the most valuable and least trained skills there is.
Psychologist Adam Grant, in Think Again, argues that thinking well isn't only reasoning logically, but daring to doubt your own conclusions.
If nothing could change your mind, what you have isn't an opinion: it's a dogma.
The three modes that stop us rethinking
Grant describes three mental roles that close us off from revising our ideas:
The preacher. When we feel a belief is sacred, we defend it fervently.
The prosecutor. When we spot flaws in others' ideas, we set about attacking them to win the case.
The politician. When we seek our group's approval, we say what's expected of us.
All three make us rigid: we defend positions instead of looking for what's true. And they're easy to spot in yourself by the emotion they bring: the preacher feels indignation, the prosecutor feels like they're winning, the politician feels relief at fitting in.
Thinking like a scientist
A good scientist doesn't marry a hypothesis: they test it, look for data that contradicts it, and abandon it if it proves false. Thinking that way means treating your opinions as provisional hypotheses: "this is what I believe for now, with the information I have."
From that stance, discovering you were wrong stops being humiliating and becomes progress. Changing your mind given better evidence isn't inconsistency: the inconsistency would be holding a belief the facts have already refuted, out of pride.
Grant cites an experiment with entrepreneurs trained in scientific thinking: they tended to pivot sooner when their initial idea wasn't working, rather than doubling down. That's exactly the skill separating learning from getting attached.
Intellectual humility
The basis of all this is recognizing that you might be wrong and that today's certainties may be tomorrow's errors. It isn't insecurity: it's knowing where the limits of your knowledge sit.
Curiously, the most confident people usually aren't the most knowledgeable. Kruger and Dunning's work described this pattern: with little command of a subject, you lack precisely the judgment needed to see how much you don't know. Take it with a caveat — the effect has been questioned methodologically and part of it may be a statistical artifact — but the practical intuition holds: real competence usually comes with nuance, not absolute certainty.
Why it's so hard
It helps to understand the resistance before trying to overcome it.
Identity gets in the way. When a belief is part of who you are, refuting it feels like a personal attack, and the body responds as it would to a threat.
The backfire risk. Bombarding someone with data contradicting their position sometimes strengthens it, because they spend their energy defending themselves.
The group outweighs the data. Changing your mind can cost you belonging, and that's expensive.
Hence a practical consequence: for someone to rethink, having more evidence rarely does the job. Lowering the threat does.
How to train rethinking
1. Add a "for now" to your beliefs and ask what evidence would change your mind. If there's none, you know what you're holding. 2. Seek people who contradict you well. Not those who argue for sport: those who argue better than you. 3. Reframe "I was wrong" as "I just learned something." That emotional shift is half the work. 4. Separate your ideas from your identity. If your worth doesn't depend on being right, changing your mind stops hurting. 5. Doubt your most comfortable certainties, which are the ones never reviewed. 6. Write down your predictions. Recording what you think will happen and checking later is the most honest way to find out how often you were right. It's the central practice in Tetlock's work on good forecasters.
How to help someone else rethink
Ask instead of asserting. "What would make you doubt that?" opens more than any data point.
Concede whatever is concedable. Acknowledging the valid part of their argument lowers defenses immediately.
Offer fewer reasons, not more. Two strong arguments persuade more than seven, because a long list invites attacking the weakest.
Don't try to win. If the other person feels they're losing, no rethinking is possible.
Common mistakes
Confusing rethinking with having no convictions. Changing your mind given better evidence is the opposite of being a weathervane.
Rethinking only other people's views. That's prosecutor mode dressed up as open-mindedness.
Seeking only confirming information. Confirmation bias operates even when you know about it.
Changing your mind under social pressure. That's politician mode, not learning.
Conclusion
Clinging to what you believed yesterday is a disadvantage; knowing how to rethink is a rare advantage. The key is stepping out of preacher, prosecutor and politician modes, treating your ideas as hypotheses, and separating your worth from being right. This week, pick one belief of yours about something that matters and write down what evidence would change your mind. If you struggle to find any, you've just discovered where to look.
References
- Grant, A. (2021). Think Again: The Power of Knowing What You Don't Know. Viking.
- Kruger, J., & Dunning, D. (1999). Unskilled and unaware of it. Journal of Personality and Social Psychology, 77(6).
- Tetlock, P. E., & Gardner, D. (2015). Superforecasting: The Art and Science of Prediction. Crown.