A promo lifts bookings in treated markets — created or just shifted?
Decide from resultsMediumProblem. A demand promo runs in some markets and bookings there rise +7% versus control markets. Leadership calls it incremental growth. As the DS, why might you push back, and what would you check?
Before you reveal: say your answer out loud, as if you were in the real interview — get your reasoning across clearly first. There is no single correct answer: reading what the interviewer is really after and defending your own thinking is what makes an answer strong.