premise: A group of young people are boating and wearing life jackets. hypothesis: Three young guys are test driving a new speed boat.
neutral: Groups of people can be larger than three, and can also be made up of more than just guys. Plus, just because young people are boating doesn't mean that its a speed boat or that its new. The boat could also be owned by one of the young people or their family and not be a test drive at all.