premise: A woman in a blue shirt is laughing with a woman in a black shirt outside, as people are sitting and standing all around them. hypothesis: Two sisters tell each other jokes in public.
neutral: Just because two woman are sitting together it doesn't mean they are sisters. They could just be coworkers on a break. You also can't assume they are telling each other jokes just because they are laughing. They may be laughing at the way the other people are dressed.