context: We doubt that Bernhard is a rhino. There is little chance that John went to the bedroom. We doubt that Lily is gray. It is highly likely that if Lily is gray, or Bernhard is a rhino, then Brian is a lion. It is impossible that if either Bernhard is a rhino, or Lily is gray, then Greg is white. There is a very good chance that if Lily is gray, or Bernhard is a rhino, then Sandra got the football.
hypothesis: Chances are about even that brian is a lion, or John went to the bedroom.
valid_hypothesis: Chances are about even that brian is a lion, or John went to the bedroom.
invalid_hypothesis: There is almost no chance that brian is a lion, or John went to the bedroom.
hypothesis_assertion: Brian is a lion, or John went to the bedroom.