premise: A senior citizen wearing a hat, blue button up shirt, Khaki shorts and sandals walking in a park holding two ice cream cones. hypothesis: The man is sitting on a bench.
contradiction: If you are walking in the park you would not be sitting on a bench.|contradiction: You can't be walking in a park while sitting on a bench.|contradiction: THE MAN CANNOT BE SITTING ON A BEACH WHILE WALKING IN A PARK.