context: It is improbable that Lily is a rhino. We believe that Bernhard is a lion. Chances are about even that Mary went to the office. It is probably the case that if Mary went to the office, and Lily is a rhino, then Winona is a wolf. We doubt that if Mary went to the office, or Bernhard is a lion, then Brian is green. It is impossible that if either Mary went to the office, or Bernhard is a lion, then Julius is a swan.
hypothesis: It is impossible that lily is a rhino, and Julius is a swan.
valid_hypothesis: It is impossible that lily is a rhino, and Julius is a swan.
invalid_hypothesis: There is a very good chance that lily is a rhino, and Julius is a swan.
hypothesis_assertion: Lily is a rhino, and Julius is a swan.