premise: Two young girls, one wearing a pink jacket and the other in a dark-colored jacket, are playing in the snow and having a snowball fight in a clearing outside of a wooded area. hypothesis: Two girls are sleeping.
contradiction: The two girls are either sleeping or playing in the snow.|contradiction: Girls do not have to be young.  If girls are playing in the snow they are not sleeping.|contradiction: The two girls are either are playing in the snow and having a snowball fight or sleeping.