context: It is highly likely that Bill is in the park. It is unlikely that Bernhard is a lion. Chances are about even that John got the milk.
hypothesis: It is unlikely that either Bernhard is a lion, or Bill is in the park.
valid_hypothesis: We believe that either Bernhard is a lion, or Bill is in the park.
invalid_hypothesis: It is unlikely that either Bernhard is a lion, or Bill is in the park.
hypothesis_assertion: Either Bernhard is a lion, or Bill is in the park.