Acquire a position. Defend it in conversation. Repeat the defense until it comes easily. Let someone cite evidence against it. Notice the tightening in the chest. Attribute the tightening to the other person's tone. Find a flaw in their source. Leave the conversation intact.
When a belief has been held long enough, the mind stops treating it as a conclusion and starts treating it as load-bearing wall. Remove it and the whole structure of who you have told people you are comes down with it. This is not stupidity or weakness — it is how identity works. The self is built from remembered positions. Revising one of them rewrites a small piece of autobiography. The mind resists autobiography revision the same way it resists any other threat. So the evidence is processed last, after every defensive maneuver has been tried.
When a belief has been held long enough, the mind stops treating it as a conclusion and starts treating it as load-bearing wall.
Charles Darwin kept what he called a "golden rule" — a habit of writing down, immediately, any observation that contradicted his theory, because he noticed those were the ones his memory quietly dropped within weeks. He understood that the comfortable mind is an editing mind, and that the editing happens below awareness. The notebooks were not modesty. They were a structural fix for a structural problem.
Luisa Brennan closed a failed consulting project on a late autumn afternoon, the kind of gray light that makes everything feel more final than it is, and she spent the first hour reading back through her original proposal looking for where the client had gone wrong. She found it. Felt better. Came back the next morning and read it again, this time looking for where her own assumptions had been weakest. That second read is the one that costs something. The proposal is the procedure from the opening. It is still there, still a document, still hers. What changes is only who is responsible for what it got right and what it didn't.
You can hold a view and still not be that view. The work is to notice which of your positions you would be embarrassed to publicly abandon. Those are the ones that have become identity, not analysis. That embarrassment is the thing to examine, not the position.