context: It is unlikely that Greg is a frog. There is a very good chance that Sandra grabbed the milk. Chances are slight that Mary went to the bedroom. There is little chance that if Sandra grabbed the milk, and Mary went to the bedroom, then Julius is a rhino. Chances are slight that if either Sandra grabbed the milk, or Mary went to the bedroom, then John discarded the milk. It is probably not the case that if either Mary went to the bedroom, or Greg is a frog, then Bernhard is white.
hypothesis: It is probably the case that sandra grabbed the milk, and Mary went to the bedroom.
valid_hypothesis: There is little chance that sandra grabbed the milk, and Mary went to the bedroom.
invalid_hypothesis: It is probably the case that sandra grabbed the milk, and Mary went to the bedroom.
hypothesis_assertion: Sandra grabbed the milk, and Mary went to the bedroom.