premise: A man in an orange shirt and dark jeans is selling ice cream. hypothesis: The man is standing completely along in a field.
contradiction: The man in each of the sentences are both doing completely different things. The first sentence explains exactly what he's wearing while the second sentence does not. The first sentence says that he is selling ice cream which means that there has to be people around and that he can't be completely alone in the field. The man either has to be selling ice cream to people or he has to be alone.