context: It is highly likely that Mary picked up the milk. It is probably the case that Lily is a rhino. We believe that Gertrude is a wolf. It is improbable that if Lily is a rhino, and Mary picked up the milk, then John went to the hallway. There is little chance that if Gertrude is a wolf, and Lily is a rhino, then Greg is gray. It is highly unlikely that if Lily is a rhino, and Gertrude is a wolf, then Brian is a frog.
hypothesis: Chances are slight that mary picked up the milk, or Greg is gray.
valid_hypothesis: It is highly likely that mary picked up the milk, or Greg is gray.
invalid_hypothesis: Chances are slight that mary picked up the milk, or Greg is gray.
hypothesis_assertion: Mary picked up the milk, or Greg is gray.