premise: The farmers are out working hard on there tractor, they have on their overalls and the machine is almost fixed. hypothesis: People wearing shorts are standing around doing nothing.
contradiction: Either the people are wearing shorts or overalls, and they are either working or doing nothing.|contradiction: One can not work hard and do nothing simultaneously. Shorts are different from overalls.|contradiction: Overalls are not shorts. Farmers working hard are not standing around doing nothing.