Premise & hypothesis: Is the premise "A younger man where black clothes is doing a trick on his skateboard off of steps." true if "A man is practicing skateboarding tricks for an upcoming competition."?
A: it is not possible to tell

Premise & hypothesis: Is the premise "A person is in the air on a bike near a river." true if "the guy is cooking"?
A: no

Premise & hypothesis: Is the premise "There is a lone hiker in the middle of a prairie with his back to the camera, showing his backpack." true if "There is a group of people in the middle of a prairie."?
A: no

Premise & hypothesis: Is the premise "A woman, wearing jeans, rolls a bowling ball down the lane." true if "A man bowling with his friends."?
A:
no