context: There is little chance that Brian is green. It is likely that Greg is a rhino. Chances are about even that Julius is a swan. There is almost no chance that if Julius is a swan, and Greg is a rhino, then John went to the bedroom. We believe that if either Greg is a rhino, or Brian is green, then Mary took the apple. It is improbable that if Greg is a rhino, and Brian is green, then Bernhard is gray.
hypothesis: It is highly unlikely that brian is green, and Julius is a swan.
valid_hypothesis: It is highly unlikely that brian is green, and Julius is a swan.
invalid_hypothesis: It is highly likely that brian is green, and Julius is a swan.
hypothesis_assertion: Brian is green, and Julius is a swan.