context: We believe that Greg is a lion. There is a very good chance that Sandra got the apple. Chances are about even that Mary discarded the milk.
hypothesis: Chances are about even that either Sandra got the apple, or Mary discarded the milk.
valid_hypothesis: Chances are about even that either Sandra got the apple, or Mary discarded the milk.
invalid_hypothesis: It is impossible that either Sandra got the apple, or Mary discarded the milk.
hypothesis_assertion: Either Sandra got the apple, or Mary discarded the milk.