premise: A man with a large mustache watches the barber conduct his work through the mirror that faces him. hypothesis: The two men are playing a game of football.
contradiction: There is either two men or one  man.  He cannot be playing football while he watches the barber.|contradiction: One man is not the same as two men and watches the barber is different that playing a game.|contradiction: The man can't be playing a game while he watches the barber.