backbone

The 'thanked you later' clause is the trap, it rules out both the pushover story and the stubborn-engineer story. What's left is a specific skill, and interviewers know exactly what it sounds like.

The trap is picking a disagreement you won, with a manager who looks foolish in hindsight. The screen is whether you can disagree with data, commit cleanly once decided, and know the one kind of issue worth escalating past a 'no'.