context: There is a very good chance that Brian is a swan. It is probably the case that Greg is yellow. It is probably not the case that Sandra dropped the milk.
hypothesis: We doubt that brian is a swan, and Sandra dropped the milk.
valid_hypothesis: We doubt that brian is a swan, and Sandra dropped the milk.
invalid_hypothesis: We believe that brian is a swan, and Sandra dropped the milk.
hypothesis_assertion: Brian is a swan, and Sandra dropped the milk.