context: There is almost no chance that John moved to the office. There is a very good chance that Lily is a swan. It is certain that Julius is a lion. It is likely that if Lily is a swan, or John moved to the office, then Sandra dropped the apple. We doubt that if either John moved to the office, or Lily is a swan, then Brian is green. It is probably not the case that if Lily is a swan, or Julius is a lion, then Greg is a frog.
hypothesis: Chances are slight that lily is a swan, and Sandra dropped the apple.
valid_hypothesis: There is a better than even chance that lily is a swan, and Sandra dropped the apple.
invalid_hypothesis: Chances are slight that lily is a swan, and Sandra dropped the apple.
hypothesis_assertion: Lily is a swan, and Sandra dropped the apple.