Premise & hypothesis: Is the premise "a young male sleds on a white sheet of plastic, with a smile on his face and his hair blowing back." true if "The mans friends are watching him."?
A: it is not possible to tell

Premise & hypothesis: Is the premise "A large white bird pulling a fish out of the water." true if "The bird is flying into the sun."?
A: no

Premise & hypothesis: Is the premise "A man grinding stones with a tool." true if "A welder is working with his tools."?
A: it is not possible to tell

Premise & hypothesis: Is the premise "A group of people sitting on the side of the road with banners in the background." true if "People are watching a race, in front of their favorite racers' banners."?
A:
it is not possible to tell