context: There is a very good chance that Julius is a lion. It is highly unlikely that Jessica is a cat. It is probably the case that Lily is gray. It is unlikely that if Lily is gray, or Julius is a lion, then Bernhard is a rhino. There is little chance that if Jessica is a cat, and Julius is a lion, then Bill is in the kitchen. Chances are about even that if either Jessica is a cat, or Julius is a lion, then John went to the office.
hypothesis: It is almost certain that either Bernhard is a rhino, or John went to the office.
valid_hypothesis: Chances are about even that either Bernhard is a rhino, or John went to the office.
invalid_hypothesis: It is almost certain that either Bernhard is a rhino, or John went to the office.
hypothesis_assertion: Either Bernhard is a rhino, or John went to the office.