context: We believe that John moved to the office. Chances are about even that Daniel dropped the apple. It is highly unlikely that Jessica is a wolf. It is probably the case that if Jessica is a wolf, and John moved to the office, then Julius is white. It is probably not the case that if John moved to the office, or Jessica is a wolf, then Bill got the milk there. It is impossible that if either Jessica is a wolf, or John moved to the office, then Lily is a rhino.
hypothesis: We doubt that either Bill got the milk there, or Lily is a rhino.
valid_hypothesis: We doubt that either Bill got the milk there, or Lily is a rhino.
invalid_hypothesis: It is almost certain that either Bill got the milk there, or Lily is a rhino.
hypothesis_assertion: Either Bill got the milk there, or Lily is a rhino.