context: We doubt that Greg is a rhino. It is improbable that John got the milk. There is a very good chance that Lily is white. There is a better than even chance that if Greg is a rhino, or Lily is white, then Julius is white. It is unlikely that if Greg is a rhino, and John got the milk, then Bernhard is a lion. It is certain that if either Lily is white, or John got the milk, then Mary went to the kitchen.
hypothesis: It is highly unlikely that either Greg is a rhino, or Mary went to the kitchen.
valid_hypothesis: There is a better than even chance that either Greg is a rhino, or Mary went to the kitchen.
invalid_hypothesis: It is highly unlikely that either Greg is a rhino, or Mary went to the kitchen.
hypothesis_assertion: Either Greg is a rhino, or Mary went to the kitchen.