context: It is impossible that Julius is a swan. Chances are slight that Daniel left the football. There is a very good chance that Fred is in the bedroom. It is highly unlikely that if either Daniel left the football, or Fred is in the bedroom, then Mary went to the kitchen. It is likely that if Fred is in the bedroom, or Julius is a swan, then Sandra got the milk. It is highly unlikely that if Fred is in the bedroom, or Julius is a swan, then Lily is a lion.
hypothesis: It is highly unlikely that either Julius is a swan, or Lily is a lion.
valid_hypothesis: It is highly unlikely that either Julius is a swan, or Lily is a lion.
invalid_hypothesis: It is highly likely that either Julius is a swan, or Lily is a lion.
hypothesis_assertion: Either Julius is a swan, or Lily is a lion.