context: It is likely that Mary went to the office. It is highly likely that Greg is white. There is almost no chance that Julius is gray. It is probably not the case that if Greg is white, and Mary went to the office, then Winona is a wolf. It is highly unlikely that if Mary went to the office, and Julius is gray, then Emily is a wolf. Chances are about even that if Greg is white, and Julius is gray, then Sandra grabbed the milk.
hypothesis: It is impossible that sandra grabbed the milk, and Julius is gray.
valid_hypothesis: It is impossible that sandra grabbed the milk, and Julius is gray.
invalid_hypothesis: It is probably the case that sandra grabbed the milk, and Julius is gray.
hypothesis_assertion: Sandra grabbed the milk, and Julius is gray.