premise: Two young children, one wearing a red striped shirt, are looking in through the window while an adult in a pink shirt watches from behind. hypothesis: Nobody has a shirt.
contradiction: Two young children are more than nobody at all.|contradiction: The adult watching from behind does have a pink shirt.  Therefore, we cannot say that nobody has a shirt because at least one person is wearing one.|contradiction: If nobody had a shirt then a kid cannot be wearing a shirt and watching an adult who is wearing a pink shirt.