context: There is almost no chance that Greg is a lion. There is a better than even chance that Sandra took the milk. Chances are slight that John dropped the apple. There is almost no chance that if Sandra took the milk, or John dropped the apple, then Brian is gray. It is improbable that if either John dropped the apple, or Sandra took the milk, then Mary moved to the garden. It is unlikely that if Sandra took the milk, or Greg is a lion, then Lily is a rhino.
hypothesis: Chances are about even that lily is a rhino, and John dropped the apple.
valid_hypothesis: There is almost no chance that lily is a rhino, and John dropped the apple.
invalid_hypothesis: Chances are about even that lily is a rhino, and John dropped the apple.
hypothesis_assertion: Lily is a rhino, and John dropped the apple.