Premise & hypothesis: Is the premise "A woman slipping backwards in the snow." true if "the woman slips"?
A: yes

Premise & hypothesis: Is the premise "A group posing, seemingly at the end of a performance." true if "People are smiling for the camera."?
A: it is not possible to tell

Premise & hypothesis: Is the premise "The girl in the purple active suit stretches upside down." true if "The girl is using her muscles."?
A: yes

Premise & hypothesis: Is the premise "a group enjoying a day at the park in their trekkies" true if "A group of trekkies is at the park."?
A:
it is not possible to tell