Premise: A little girl gets in to a pool.

Hypothesis: A little girl dives into a pool.
it is not possible to tell

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 clothed man is riding a bicycle.
yes

Premise: A young man and woman dance at a retirement home while three old ladies look on.

Hypothesis: A young man and woman are being active.
yes

Premise: a waterskier flying slighty in the air over a wave

Hypothesis: A waterskier is going over a large wave
it is not possible to tell