context: It is almost certain that Brian is a lion. It is almost certain that Sandra grabbed the milk. Chances are about even that Greg is a rhino. Chances are slight that if Greg is a rhino, and Sandra grabbed the milk, then John moved to the garden. There is a very good chance that if Brian is a lion, and Sandra grabbed the milk, then Julius is green. There is little chance that if either Greg is a rhino, or Brian is a lion, then Bernhard is white.
hypothesis: It is certain that sandra grabbed the milk, or Brian is a lion.
valid_hypothesis: It is certain that sandra grabbed the milk, or Brian is a lion.
invalid_hypothesis: There is little chance that sandra grabbed the milk, or Brian is a lion.
hypothesis_assertion: Sandra grabbed the milk, or Brian is a lion.