context: There is little chance that Sandra grabbed the milk. There is a better than even chance that John moved to the office. It is unlikely that Julius is green. We believe that if Sandra grabbed the milk, and John moved to the office, then Gertrude is a mouse. Chances are about even that if either John moved to the office, or Sandra grabbed the milk, then Lily is a rhino. There is little chance that if Sandra grabbed the milk, or John moved to the office, then Brian is a frog.
hypothesis: Chances are about even that either Brian is a frog, or John moved to the office.
valid_hypothesis: Chances are about even that either Brian is a frog, or John moved to the office.
invalid_hypothesis: It is impossible that either Brian is a frog, or John moved to the office.
hypothesis_assertion: Either Brian is a frog, or John moved to the office.