premise: A man and a child painting a post. hypothesis: The two men are fighting.
contradiction: If one person is a child, there cannot be two men. Painting and fighting are not the same thing.|contradiction: A man and a child is different from the two men, and while the two men are fighting, the man and child are painting a post.|contradiction: A man and a child are not two men. If they are painting, then they are not fighting.