context: It is probably the case that Bernhard is gray. There is a better than even chance that Brian is a rhino. It is impossible that Greg is a frog. We believe that if Brian is a rhino, or Bernhard is gray, then Lily is a frog. There is little chance that if Brian is a rhino, or Bernhard is gray, then Mary went to the office. There is a very good chance that if Bernhard is gray, and Brian is a rhino, then Julius is a swan.
hypothesis: It is impossible that brian is a rhino, or Lily is a frog.
valid_hypothesis: There is a very good chance that brian is a rhino, or Lily is a frog.
invalid_hypothesis: It is impossible that brian is a rhino, or Lily is a frog.
hypothesis_assertion: Brian is a rhino, or Lily is a frog.