— the belief as it was stated going in.
— the evidence that overturned it.
— one line on the belief the whole strategy was resting on, and what it would cost to be wrong.
An assumption everyone had agreed to stop questioning — which is exactly why it was worth testing.
A paragraph or two laying out the beliefs on the table: where they came from, why they felt safe, and what decisions were about to be built on top of them.
Close by naming the risk: acting on an untested belief isn’t confidence, it’s a guess wearing a suit. So we put each one on trial.
— the belief as it was stated going in.
— the evidence that overturned it.
— a belief that turned out to be right.
— the evidence that backed it, now with proof behind it instead of instinct.
— roughly right, but blunt.
— the more precise version the data revealed, and the one worth acting on.
— not the theory they walked in with, but the one they could actually build on.
No lengthy brief required. If you know the assumption you’re betting on, that’s enough to start.