context: It is highly unlikely that Mary put down the milk. There is a better than even chance that Greg is green. It is almost certain that Brian is a lion. It is impossible that if either Brian is a lion, or Greg is green, then Lily is a rhino. It is impossible that if Mary put down the milk, or Greg is green, then John went to the garden. It is unlikely that if Greg is green, and Brian is a lion, then Sandra left the milk.
hypothesis: Chances are slight that lily is a rhino, or Sandra left the milk.
valid_hypothesis: Chances are slight that lily is a rhino, or Sandra left the milk.
invalid_hypothesis: It is probably the case that lily is a rhino, or Sandra left the milk.
hypothesis_assertion: Lily is a rhino, or Sandra left the milk.