context: There is little chance that Brian is white. It is certain that Bernhard is a frog. It is likely that Sandra got the milk. It is likely that if Bernhard is a frog, or Sandra got the milk, then Winona is a wolf. We believe that if either Sandra got the milk, or Brian is white, then Julius is a swan. It is improbable that if Sandra got the milk, and Brian is white, then John moved to the office.
hypothesis: We believe that sandra got the milk, and Brian is white.
valid_hypothesis: It is highly unlikely that sandra got the milk, and Brian is white.
invalid_hypothesis: We believe that sandra got the milk, and Brian is white.
hypothesis_assertion: Sandra got the milk, and Brian is white.