context: Chances are slight that Greg is gray. It is highly unlikely that Lily is a frog. We doubt that Mary put down the milk. It is certain that if Lily is a frog, or Mary put down the milk, then Bernhard is white. We believe that if either Mary put down the milk, or Lily is a frog, then John went to the kitchen. There is a better than even chance that if Lily is a frog, or Mary put down the milk, then Brian is green.
hypothesis: It is unlikely that either Greg is gray, or Brian is green.
valid_hypothesis: It is unlikely that either Greg is gray, or Brian is green.
invalid_hypothesis: It is probable that either Greg is gray, or Brian is green.
hypothesis_assertion: Either Greg is gray, or Brian is green.