context: It is improbable that Brian is gray. It is impossible that Mary grabbed the milk. It is almost certain that Julius is gray.
hypothesis: It is impossible that brian is gray, and Mary grabbed the milk.
valid_hypothesis: It is impossible that brian is gray, and Mary grabbed the milk.
invalid_hypothesis: It is highly likely that brian is gray, and Mary grabbed the milk.
hypothesis_assertion: Brian is gray, and Mary grabbed the milk.