Deny the question, and emphasize the answer with LAAR=NNGIT, which covers the concept of "definitely not", among others.
Ex:
Arnannguaq naapippiuk?? (Have you met Arnannguaq?) => Naamik, Arnannguaq naapilaanngilara. (No, I have definitely not met Arnannguaq.)
Push to play the audio, to check your answer, to play the solution, or to reveal the solution.