Every statement MDT-1 is going to make will come from a single reference frame, and every question you ask him will be answered in that frame. He sees every other frame as "mistaken." There is no point in trying to convince him that he is making an error because there is nothing wrong with that perspective, it just isn't the way physics is done, because physics is built for physicists, and physicists can be in different frames from MDT-1. This is the sum total of everything coherent that will ever come out of this thread.