context: There is a better than even chance that Greg is green. It is almost certain that Mary went to the garden. It is almost certain that Bernhard is a swan. There is a better than even chance that if either Bernhard is a swan, or Mary went to the garden, then Lily is a lion. There is almost no chance that if Mary went to the garden, and Greg is green, then Sandra grabbed the milk. It is likely that if Greg is green, or Mary went to the garden, then Brian is gray.
hypothesis: It is certain that either Brian is gray, or Bernhard is a swan.
valid_hypothesis: It is probably not the case that either Brian is gray, or Bernhard is a swan.
invalid_hypothesis: It is certain that either Brian is gray, or Bernhard is a swan.
hypothesis_assertion: Either Brian is gray, or Bernhard is a swan.