premise: A man in a red-striped polo shirt and jeans walks by a wall in a back alley painted by graffiti artists. hypothesis: A man is running away through an alley after stealing money from an establishment.
contradiction: A man in red striped polo shirt an jeans is completely different than a generic description of just a man, also walking and running are some what opposites of movement as one is moderately paced while the other is much faster.