context: It is probably not the case that Lily is a rhino. Chances are slight that Brian is a lion. There is almost no chance that Greg is a frog. It is highly unlikely that if Brian is a lion, or Greg is a frog, then Mary went to the bedroom. It is probably not the case that if Greg is a frog, or Lily is a rhino, then Bernhard is a swan. It is likely that if Brian is a lion, and Greg is a frog, then John got the apple.
hypothesis: It is highly unlikely that either Bernhard is a swan, or John got the apple.
valid_hypothesis: It is highly unlikely that either Bernhard is a swan, or John got the apple.
invalid_hypothesis: It is probable that either Bernhard is a swan, or John got the apple.
hypothesis_assertion: Either Bernhard is a swan, or John got the apple.