context: It is probable that Bernhard is gray. It is probable that Lily is a frog. There is a better than even chance that Sandra got the football. We believe that if either Lily is a frog, or Bernhard is gray, then Yann is thirsty. It is probably not the case that if either Sandra got the football, or Lily is a frog, then Greg is a swan. It is highly unlikely that if Bernhard is gray, or Sandra got the football, then Brian is a lion.
hypothesis: It is improbable that bernhard is gray, and Greg is a swan.
valid_hypothesis: It is improbable that bernhard is gray, and Greg is a swan.
invalid_hypothesis: We believe that bernhard is gray, and Greg is a swan.
hypothesis_assertion: Bernhard is gray, and Greg is a swan.