Two men are wrestling , one has the other pinned to the floor and the man on the floor is wincing in pain .
It is certain that two men have been wrestling for an hour as one of them are about to win .
It is impossible that two men have been wrestling for an hour as one of them are about to win .
It is certain that two men have been wrestling for an hour as one of them are about to win .
Two men have been wrestling for an hour as one of them are about to win .