premise: Group of people standing on a snow covered ground, some are holding brooms, there is a dog with the group. hypothesis: Group of people at the beach enjoying a hot sunny day.
contradiction: The people are either at the beach or a snow covered ground.  Most beach areas do not get snow.|contradiction: If they are on snow covered ground, they are not also at the beach on a sunny day at the same time.|contradiction: The snow is different from the beach.