Premise & hypothesis: Is the premise "A young snowboarder catches some air on his black snowboard." true if "A young man is riding a snowboard."?
A: yes

Premise & hypothesis: Is the premise "Two guys, both wearing white suits one with a black belt the other one with a black and red belt, they are having a match." true if "The guy is alone in his bathroom."?
A: no

Premise & hypothesis: Is the premise "A man jumps into the water on a sunny day." true if "The man is at a swimming pool on a hot day,"?
A: it is not possible to tell

Premise & hypothesis: Is the premise "Three construction workers are standing on a boat while one of the men points at something." true if "Some construction workers are repairing a boat."?
A:
it is not possible to tell