premise: A teenage male is sitting on a stool playing the carnival game where you shoot water into the mouth of, usually, a clown in order to pop a balloon. hypothesis: An elderly male is standing on a stool playing a carnival game.
contradiction: The words 'teenage' and 'elderly' describe people with large variances in age they cannot be the same person, likewise sitting implies that your backside is on a surface, while standing means that you are upright on both feet.