premise: A little toddler in blue pants is crawling on the road. hypothesis: A large child in a pink dress is running on the sidewalk.
contradiction: A toddler cannot be little and a large child simultaneously. Also a person cannot be crawling and running simultaneously. Although one can wear blue pants and a pink dress simultaneously, sentence 1 contradicts sentence 2 in that the former states the toddler is in blue pants and the latter states the child is in a pink dress.