context: It is probably the case that Greg is a swan. It is likely that John went to the office. It is highly unlikely that Brian is green. We believe that if either Brian is green, or Greg is a swan, then Bernhard is gray. Chances are slight that if Greg is a swan, and John went to the office, then Mary picked up the apple. It is probably not the case that if John went to the office, and Brian is green, then Sandra dropped the milk.
hypothesis: There is almost no chance that bernhard is gray, or Greg is a swan.
valid_hypothesis: It is probable that bernhard is gray, or Greg is a swan.
invalid_hypothesis: There is almost no chance that bernhard is gray, or Greg is a swan.
hypothesis_assertion: Bernhard is gray, or Greg is a swan.