context: Chances are slight that Julius is a lion. We believe that Lily is a lion. It is improbable that John went to the garden. There is little chance that if Lily is a lion, and John went to the garden, then Sandra left the milk. It is unlikely that if Lily is a lion, and John went to the garden, then Brian is white. Chances are slight that if John went to the garden, and Julius is a lion, then Greg is green.
hypothesis: There is a very good chance that either Sandra left the milk, or Greg is green.
valid_hypothesis: It is impossible that either Sandra left the milk, or Greg is green.
invalid_hypothesis: There is a very good chance that either Sandra left the milk, or Greg is green.
hypothesis_assertion: Either Sandra left the milk, or Greg is green.