Use the information given in the case unless the interviewer invites you to bring in outside knowledge.

If an assumption seems inconsistent, clarify it respectfully, but do not turn the interview into a debate about industry trivia.

Your experience can help you ask better questions or sanity-check results, but the case still operates within the facts provided.

Demonstrating business judgment is valuable; demonstrating that you know more than the case writer is not the objective.

Industry knowledge helped me spot odd numbers, but I learned not to fight the prompt.