Double Down
To increase commitment after a setback — from blackjack, where it's math, to strategy, where it's often ego. The line between conviction and sunk-cost denial runs through this phrase.
Heard in the wild
“Despite the pilot's numbers, they doubled down on the rollout.”
Tone check: Professional
Ask what new information justifies the doubling. 'We've come too far to stop' is the sunk-cost fallacy speaking fluent executive.