context: We doubt that Greg is gray. There is almost no chance that Daniel dropped the milk. There is almost no chance that Bernhard is a swan. Chances are slight that if Daniel dropped the milk, and Bernhard is a swan, then Fred is in the school. It is probable that if Greg is gray, or Daniel dropped the milk, then John moved to the office. It is highly unlikely that if Daniel dropped the milk, or Greg is gray, then Lily is yellow.
hypothesis: It is probably the case that either Greg is gray, or Lily is yellow.
valid_hypothesis: It is unlikely that either Greg is gray, or Lily is yellow.
invalid_hypothesis: It is probably the case that either Greg is gray, or Lily is yellow.
hypothesis_assertion: Either Greg is gray, or Lily is yellow.