context: Chances are about even that Mary moved to the office. It is highly unlikely that Greg is green. It is probable that Sandra left the milk. We believe that if Sandra left the milk, and Greg is green, then John went to the bedroom. Chances are about even that if Sandra left the milk, or Mary moved to the office, then Julius is a frog. Chances are about even that if either Sandra left the milk, or Mary moved to the office, then Lily is a rhino.
hypothesis: We believe that lily is a rhino, or Sandra left the milk.
valid_hypothesis: We believe that lily is a rhino, or Sandra left the milk.
invalid_hypothesis: There is little chance that lily is a rhino, or Sandra left the milk.
hypothesis_assertion: Lily is a rhino, or Sandra left the milk.