context: It is highly likely that Bernhard is gray. Chances are slight that Julie is in the bedroom. Chances are slight that Greg is yellow. It is impossible that if Greg is yellow, or Julie is in the bedroom, then Sandra took the milk. It is almost certain that if either Julie is in the bedroom, or Greg is yellow, then Brian is a swan. It is almost certain that if either Bernhard is gray, or Greg is yellow, then John picked up the apple.
hypothesis: It is almost certain that brian is a swan, or Greg is yellow.
valid_hypothesis: It is unlikely that brian is a swan, or Greg is yellow.
invalid_hypothesis: It is almost certain that brian is a swan, or Greg is yellow.
hypothesis_assertion: Brian is a swan, or Greg is yellow.