Premise: Two guys looking at the screen of a tv while one sings,(presumably) and the other plays a set of big wooden drums.

Hypothesis: The two men are in a band together.
it is not possible to tell

Premise: A woman scuba diving with a large sea turtle.

Hypothesis: A woman swims with a sea turtle.
yes

Premise: A man wearing a helmet, red pants with white stripes going down the sides and a white and red shirt is on a small bicycle using only his hands while his legs are up in the air, while another man wearing a light blue shirt with dark blue trim and black pants with red stripes going up the sides is standing nearby, gesturing toward the first man and holding a small figurine of one of the seven dwarves.

Hypothesis: a man with a helmet is atop a bike with his legs off the pegs, other men are also there.
yes

Premise: A soccer player tries to kick the ball in the goal.

Hypothesis: A person is playing a sport.
yes