premise: There is a little blond-hair girl with a green sweatshirt and a red shirt playing on a playground. hypothesis: The young girl is wearing purple snow pants, helping her father shovel the front steps of their house.
contradiction: Sentence 1 states the girl is little   Sentence 2 states the girl is young.  If the girl is young, she may or may not be little.  Sentence 1 states she is in a green sweatshirt and a rad shirt.  Sentence 2 has different clothing of purple show pants.  Sentence does not mention if she has snow pants on and sentence 2 does not mention a sweatshirt or a shirt.  Sentence 1 states she is playing which is different action from sentence 2 which states she is helping.  Sentence 1 states she is on a playground. Sentence 2 states she in on the front steps of her house which is not the playground.