Premise: Four young males sitting in a circle talking.

Hypothesis: Two sets of twins are sitting in a circle.
it is not possible to tell

Premise: Some young men looking over the edge of a bridge on a sunny day.

Hypothesis: Several men on a bridge in the rain.
no

Premise: A group of runners are pictured while running a marathon.

Hypothesis: A group of people are biking.
no

Premise: The musician in the brown coat is walking in his tennis shoes.

Hypothesis: The tennis shoes are old.
it is not possible to tell