Premise: A young boy, dressed in cowboy attire, rides a galloping horse.

Hypothesis: A young boy riding the horse he got for his birthday.
it is not possible to tell

Premise: The happy couple enjoys the scenic winter stream.

Hypothesis: A couple is burying someone in the snow.
no

Premise: A girl in a brown shirt talks on her phone while a girl and guy play guitar.

Hypothesis: The three people are wrestling with eachother
no

Premise: A group of people are in the water.

Hypothesis: A person sitting on dry ground.
no