context: It is highly unlikely that Winona is a sheep. There is little chance that John went to the bedroom. Chances are about even that Greg is a lion. It is improbable that if either Greg is a lion, or Winona is a sheep, then Julius is a swan. It is highly likely that if John went to the bedroom, or Greg is a lion, then Jeff dropped the apple. It is impossible that if either John went to the bedroom, or Greg is a lion, then Lily is a rhino.
hypothesis: It is certain that lily is a rhino, or Julius is a swan.
valid_hypothesis: It is highly unlikely that lily is a rhino, or Julius is a swan.
invalid_hypothesis: It is certain that lily is a rhino, or Julius is a swan.
hypothesis_assertion: Lily is a rhino, or Julius is a swan.