context: We doubt that Greg is a lion. It is probably not the case that Bill dropped the milk. It is improbable that John went to the hallway. We doubt that if John went to the hallway, and Bill dropped the milk, then Sandra left the apple. It is highly unlikely that if either John went to the hallway, or Bill dropped the milk, then Bernhard is a rhino. There is a better than even chance that if Greg is a lion, or Bill dropped the milk, then Julius is gray.
hypothesis: There is a very good chance that either Bill dropped the milk, or John went to the hallway.
valid_hypothesis: It is probably not the case that either Bill dropped the milk, or John went to the hallway.
invalid_hypothesis: There is a very good chance that either Bill dropped the milk, or John went to the hallway.
hypothesis_assertion: Either Bill dropped the milk, or John went to the hallway.