context: It is impossible that Greg is a swan. It is unlikely that John got the milk. It is highly unlikely that Bernhard is a swan.
hypothesis: We believe that bernhard is a swan, and John got the milk.
valid_hypothesis: There is almost no chance that bernhard is a swan, and John got the milk.
invalid_hypothesis: We believe that bernhard is a swan, and John got the milk.
hypothesis_assertion: Bernhard is a swan, and John got the milk.