Tell me about a time you disagreed with someone and later realized they were right.

This screens intellectual humility and calibration, not niceness. The dangerous answers are the humble-brag ('I was technically right but they had a point about timing') and the trivial stake ('we disagreed about a variable name'). The signal is a disagreement that mattered, a clean account of the evidence that changed your mind, and a durable change in how you operate, not just 'I learned to listen more.' The reserved follow-up is 'how fast did you update once you saw the data' and 'what would have made you update sooner,' which separate people who update on evidence from people who update on social pressure.