context: We believe that Greg is a lion. It is improbable that Mary discarded the milk. It is highly likely that Fred went to the bedroom.
hypothesis: There is a very good chance that either Fred went to the bedroom, or Mary discarded the milk.
valid_hypothesis: There is a very good chance that either Fred went to the bedroom, or Mary discarded the milk.
invalid_hypothesis: There is little chance that either Fred went to the bedroom, or Mary discarded the milk.
hypothesis_assertion: Either Fred went to the bedroom, or Mary discarded the milk.