context: It is improbable that Fred dropped the milk. It is probably not the case that Brian is a swan. It is highly likely that Greg is a lion.
hypothesis: It is probably not the case that brian is a swan, and Greg is a lion.
valid_hypothesis: It is probably not the case that brian is a swan, and Greg is a lion.
invalid_hypothesis: We believe that brian is a swan, and Greg is a lion.
hypothesis_assertion: Brian is a swan, and Greg is a lion.