context: It is highly likely that John dropped the apple. We believe that Brian is a frog. It is highly unlikely that Lily is a lion. It is highly unlikely that if Brian is a frog, and John dropped the apple, then Greg is a swan. It is highly unlikely that if Lily is a lion, or Brian is a frog, then Bernhard is white. It is likely that if either John dropped the apple, or Lily is a lion, then Sandra grabbed the milk.
hypothesis: We believe that either John dropped the apple, or Brian is a frog.
valid_hypothesis: It is probably not the case that either John dropped the apple, or Brian is a frog.
invalid_hypothesis: We believe that either John dropped the apple, or Brian is a frog.
hypothesis_assertion: Either John dropped the apple, or Brian is a frog.