context: It is highly unlikely that Greg is gray. It is unlikely that Mary went to the hallway. There is almost no chance that Bernhard is a lion. It is probably the case that if Greg is gray, or Mary went to the hallway, then Sandra dropped the milk. There is a better than even chance that if Greg is gray, or Bernhard is a lion, then Julius is a swan. It is certain that if either Bernhard is a lion, or Greg is gray, then Brian is white.
hypothesis: There is almost no chance that either Julius is a swan, or Greg is gray.
valid_hypothesis: There is almost no chance that either Julius is a swan, or Greg is gray.
invalid_hypothesis: It is likely that either Julius is a swan, or Greg is gray.
hypothesis_assertion: Either Julius is a swan, or Greg is gray.