premise: A man with a white tank top is on a scooter is driving up the street. hypothesis: The man is wearing a tank top while driving to show off his muscles.
neutral: Sentence 1 indicates A  not a specific the.  In sentence 2 wearing a tank top is not inferred from sentence 1 with a white tank top.  With does not infer wearing and a tank top is not inferred by the specific white tank top that is indicated in sentence 1.  Sentence 2 states to show off his muscles which cannot be inferred from sentence 1 is driving up the street.  There can be many reasons why a man is driving up the street.