Suppose that two boxers (or MMA fighters or similar) chose not to fight. They do nothing and persist in doing nothing even when instructed to start fighting.
Now if it was just one doing so, then he would either be attacked and knocked out, pinned, scored lower than his opponent, or otherwise determined to be the losing fighter.
But what if both fighters were doing the same, refusing to fight? Would it be a double loss? How is that decided?