PM Somare does not need to prove anything on the floor of Parliament. The grace period of 1-year for a vote-of-no confidence against the PM has already lapsed even on the day that O'Neill's illegal government attempted to remove the democratically elected leader from Parliament.
Your MP (O'Neill) is a crook and now a destroyer of the Constitution, a crime of the highest nature on the land. He will be running for cover to his father's homeland very soon unless. He cannot be emotional looking to the public for support. The law is the law and the Constitution is the Constitution. It reigns supreme!!