Decision Mastery Check the Evidence

Confirmation Bias Flip

Say this

What's the best case against this?

Do this now 3 min

Write your current leaning in one sentence. Now write the single strongest argument against it — not a weak strawman, but the version a smart opponent would make.

Use when

You feel confident about a decision and haven't actively looked for reasons you might be wrong.

Avoid when

You've already stress-tested the idea through structured dissent or a red team review.


Why it works

The brain instinctively seeks evidence that confirms what it already believes — forcing one strong counterargument breaks that loop.

Your brain doesn’t search for truth — it searches for evidence that you’re right. This is a predictable search pattern, not a character flaw. You notice supporting facts, remember confirming examples, and interpret ambiguous information in your favour. The only reliable counter is deliberate: force yourself to articulate the strongest possible case against your current position. Not a weak version you can easily dismiss, but the version a smart, well-informed opponent would make. If it doesn’t threaten your position even slightly, you haven’t tried hard enough.


Go deeper · 8 min read
Confirmation Bias: Why Your Brain Searches for Agreement, Not Truth
You already know to argue the other side. What you may not know is that your judgement downgrades the evidence against you the moment it arrives, which is why confidence is a worse signal than it feels.
Related tools
The newsletter

One tool a week

How you think, decide, lead, focus, and stay steady under pressure. A specific way to practice one move before the next seven days are out. Grounded in evidence, not self-help.

One email a week. Leave whenever. Powered by Buttondown.