premise: A man wearing red swim trunks and a red swimming cap is diving off a cliff. hypothesis: A man in blue trunks is sitting on the cliff.
contradiction: The man is either in blue or red trunks, also he is either is sitting on the cliff diving off the cliff.|contradiction: Can't be wearing blue trunks if wearing red trunks. Man can't be sitting if he is diving.|contradiction: The man can't be wearing both red and blue swimming trunks.