premise: A child wearing yellow jacket stands on the shore testing the water with his red rubber boot clad toe. hypothesis: A child wearing an orange jacket is skiing down a large slope.
contradiction: He refers to the child wearing a yellow jacket and testing the water by the shore, but then proceeds to state that the child is wearing an orange jacket and is skiing down a large slope. Also, it's useless to test the water wearing red rubber boots because you won't get a sense of how cold or warm the water is.