context: It is probably the case that Greg is a swan. There is a very good chance that Brian is a rhino. There is a very good chance that Bernhard is yellow. There is almost no chance that if Brian is a rhino, or Bernhard is yellow, then Julius is a frog. It is probable that if Brian is a rhino, or Greg is a swan, then Bill went to the bedroom. There is almost no chance that if either Greg is a swan, or Brian is a rhino, then Sandra left the football.
hypothesis: We doubt that brian is a rhino, or Sandra left the football.
valid_hypothesis: There is a very good chance that brian is a rhino, or Sandra left the football.
invalid_hypothesis: We doubt that brian is a rhino, or Sandra left the football.
hypothesis_assertion: Brian is a rhino, or Sandra left the football.