Explain Why A Trivia Answer Is Wrong Without The Argument

The answer sheet says one thing, your mate is adamant it is wrong, and the argument has now outlasted the quiz itself. This explains clearly why the accepted answer holds up, credits the mix-up if it is an understandable one, and flags any genuine ambiguity, so the table moves on rather than relitigating round four all night.

Someone insists the answer to a trivia question about {TOPIC} is {THEIR_ANSWER}, but the accepted answer is {CORRECT_ANSWER}. Explain clearly why the accepted answer is correct, note if their answer is a common and understandable mix-up rather than a wild guess, and mention any genuine ambiguity in the original question that might explain the disagreement. Keep the tone neutral and factual, suitable for settling the argument without anyone losing face.