context: It is almost certain that Greg is a swan. It is highly unlikely that Brian is gray. It is likely that Sumit is thirsty.
hypothesis: It is highly unlikely that greg is a swan, and Brian is gray.
valid_hypothesis: It is highly unlikely that greg is a swan, and Brian is gray.
invalid_hypothesis: It is highly likely that greg is a swan, and Brian is gray.
hypothesis_assertion: Greg is a swan, and Brian is gray.