premise: A child is thrown by a man in the swimming pool. hypothesis: A child is tosses into a box by a woman.
contradiction: A child cannot be thrown by a man and tossed by a woman simultaneously.|contradiction: Then difference is in the first the child is thrown by a man and the second is a child being tossed by a woman.|contradiction: A child cannot be tossed into both a box and a swimming pool simultaneously. The person throwing the child cannot be both a man and a woman.