context: It is highly likely that Julius is white. We believe that Mary went to the hallway. Chances are about even that Lily is a rhino. There is a better than even chance that if Lily is a rhino, and Mary went to the hallway, then Brian is a frog. There is a very good chance that if either Lily is a rhino, or Mary went to the hallway, then Bernhard is a swan. It is impossible that if either Mary went to the hallway, or Lily is a rhino, then John moved to the office.
hypothesis: We doubt that brian is a frog, or John moved to the office.
valid_hypothesis: We doubt that brian is a frog, or John moved to the office.
invalid_hypothesis: It is almost certain that brian is a frog, or John moved to the office.
hypothesis_assertion: Brian is a frog, or John moved to the office.