context: Three young boys one is holding a camera and another is holding a green toy all are wearing t-shirt and smiling.
hypothesis: It is certain that the boy is crouching down to take a picture.
valid_hypothesis: It is impossible that the boy is crouching down to take a picture.
invalid_hypothesis: It is certain that the boy is crouching down to take a picture.
hypothesis_assertion: The boy is crouching down to take a picture.