context: It is likely that Jessica is a sheep. It is highly unlikely that John discarded the apple. It is unlikely that Fred is in the bedroom. There is little chance that if either John discarded the apple, or Fred is in the bedroom, then Gertrude is a mouse. We doubt that if John discarded the apple, and Jessica is a sheep, then Julius is a lion. Chances are about even that if either John discarded the apple, or Fred is in the bedroom, then Lily is a rhino.
hypothesis: There is little chance that either Fred is in the bedroom, or Lily is a rhino.
valid_hypothesis: There is little chance that either Fred is in the bedroom, or Lily is a rhino.
invalid_hypothesis: It is highly likely that either Fred is in the bedroom, or Lily is a rhino.
hypothesis_assertion: Either Fred is in the bedroom, or Lily is a rhino.