Do not change your answer simply because the interviewer pushes back. First understand whether they are exposing a flaw, introducing new information, or testing whether you can defend a sound conclusion.

A good response starts by acknowledging the challenge and checking the logic. If your reasoning still holds, explain it briefly. If the challenge reveals a real gap, update the recommendation without becoming defensive.

You might say: "Given the data we used, I would still favor option A because of X. If the constraint you mentioned is binding, I would revise toward B."

Practice separating confidence from stubbornness. The goal is to show that your recommendation changes when the evidence changes, not when the tone becomes more forceful. A concise, evidence-based explanation will usually sound stronger than a long defensive one. For more detail, see the case interview guide.