context: It is probably not the case that Daniel is in the garden. Chances are about even that Julius is a rhino. It is impossible that Greg is a swan. It is certain that if either Daniel is in the garden, or Greg is a swan, then John went to the hallway. There is a better than even chance that if Greg is a swan, or Daniel is in the garden, then Bill got the milk there. It is almost certain that if either Greg is a swan, or Julius is a rhino, then Brian is green.
hypothesis: We believe that julius is a rhino, and Bill got the milk there.
valid_hypothesis: It is highly unlikely that julius is a rhino, and Bill got the milk there.
invalid_hypothesis: We believe that julius is a rhino, and Bill got the milk there.
hypothesis_assertion: Julius is a rhino, and Bill got the milk there.