context: There is almost no chance that Bill got the milk there. It is certain that Winona is a mouse. It is probable that Brian is yellow. It is improbable that if either Bill got the milk there, or Brian is yellow, then Julius is white. We believe that if Winona is a mouse, and Bill got the milk there, then Mary left the apple. It is certain that if Winona is a mouse, and Bill got the milk there, then Greg is a swan.
hypothesis: There is almost no chance that greg is a swan, or Bill got the milk there.
valid_hypothesis: There is almost no chance that greg is a swan, or Bill got the milk there.
invalid_hypothesis: It is certain that greg is a swan, or Bill got the milk there.
hypothesis_assertion: Greg is a swan, or Bill got the milk there.