The double crux method is a collaborative communication technique used to resolve deep disagreements. A "crux" is a foundational sub-belief that your main conclusion hinges upon. A "double crux" occurs when both people in a dispute find a shared underlying belief where, if they could test or change their mind on that specific point, their main disagreement would dissolve.Steps of the Double Crux MethodPick a clear disagreement: Select a specific topic where you and another person hold opposing views or different levels of confidence.Operationalize the terms: Define vague words and focus on concrete, real-world examples instead of abstract theory.Find your individual cruxes: Ask yourself, "What fact or evidence would make me change my mind about this?"Identify the double crux: Share your cruxes to see where your reasoning overlaps. Look for the core statement where both of your positions depend on that same piece being true or false.Test the shared crux: Shift the argument away from trying to "win" and instead investigate that specific underlying fact together through evidence or logic.