Thinking method · Common in rationalist practice; see Galef, The Scout Mindset

Find the crux

Locating the one belief that, if it flipped, would change both your minds. A disagreement that has gone several rounds without moving.

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Locating the one belief that, if it flipped, would change both your minds.

The steps

1. Each side states their position plainly.
2. Each asks themselves: what would have to be true for me to change my mind?
3. Compare the answers and look for one belief you disagree about where BOTH would move.
4. That is the crux. Argue about that, and nothing else.
5. If there is no crux, the disagreement is about values, not facts — say so and stop.

When to use it

A disagreement that has gone several rounds without moving.

What it will not do

It requires both sides to want to find out. One-sided, it still tells you what you believe.

Where it comes from: Common in rationalist practice; see Galef, The Scout Mindset. Described in our own words.