context: It is probable that John went to the hallway. We believe that Fred left the football. It is probably not the case that Lily is yellow. It is probably not the case that if Lily is yellow, or Fred left the football, then Mary picked up the milk. There is little chance that if Lily is yellow, or John went to the hallway, then Bernhard is a swan. It is highly unlikely that if Lily is yellow, or Fred left the football, then Greg is white.
hypothesis: It is certain that fred left the football, and Bernhard is a swan.
valid_hypothesis: It is highly unlikely that fred left the football, and Bernhard is a swan.
invalid_hypothesis: It is certain that fred left the football, and Bernhard is a swan.
hypothesis_assertion: Fred left the football, and Bernhard is a swan.