Premise & hypothesis: Is the premise "A man in a black cowboy hat holds on as his horse rears up." true if "A man is riding a bull."?
A: no

Premise & hypothesis: Is the premise "An old man in green is walking down a broad sidewalk." true if "An old man takes his last walk down his favorite sidewalk"?
A: it is not possible to tell

Premise & hypothesis: Is the premise "A male and female snowboarder pose for the camera in snow." true if "Two people pose."?
A: yes

Premise & hypothesis: Is the premise "Some women ride in their boats by an area of grass and homes." true if "Some women are fishing in some boats."?
A:
it is not possible to tell