premise: A older man with gray hair wearing a gray suit next to a green and yellow taxi. hypothesis: A older woman sits in a green and yellow taxi.
contradiction: One is either a man or one is a woman but not both at the same time, and one either sits in a green and yellow taxi or one is next to a green and yellow taxi but not both simultaneously.|contradiction: An older man is not the same as an older woman.|contradiction: The person cannot be both in and next to the taxi. In addition, they are either a man or a woman.