context: A white dog, a brown dog, and a black dog frolicking in a grassy field.
hypothesis: There is almost no chance that several dogs are chasing frisbees in a grassy field.
valid_hypothesis: There is almost no chance that several dogs are chasing frisbees in a grassy field.
invalid_hypothesis: It is certain that several dogs are chasing frisbees in a grassy field.
hypothesis_assertion: Several dogs are chasing frisbees in a grassy field.