Premise & hypothesis: Is the premise "A young man jumps off a cliff and into a river while his girlfriend watches and his brother fishes." true if "A girl watches her boyfriend jump into a river."?
A: yes

Premise & hypothesis: Is the premise "a man in a white shirt is metal detecting, while two other men watch." true if "Three men are on the beach searching for a set of lost keys with a metal detector."?
A: it is not possible to tell

Premise & hypothesis: Is the premise "Two singers in white shirts on stag in a bar." true if "People are performing."?
A: yes

Premise & hypothesis: Is the premise "A man zipping up his pants on stage." true if "A man is acting in a play."?
A:
it is not possible to tell