premise: A dark-skinned man in white shirts and a black sleeveless shirt flips his skateboard on a cement surface surrounded by tall buildings and palm trees. hypothesis: a man sitting down builds a tall building and eats a palm tree.
contradiction: It would be very unusual that one eats a palm tree that surrounds one's location. One could not flip one's skateboard while sitting down.|contradiction: The man cannot builds a tall building and flips his skateboard at the same time.|contradiction: The man that builds a tall building would not have flip his skateboard same time.