context: There is a very good chance that Mary dropped the milk. We believe that Bill went to the office. It is unlikely that Julius is green.
hypothesis: It is improbable that mary dropped the milk, and Bill went to the office.
valid_hypothesis: There is a better than even chance that mary dropped the milk, and Bill went to the office.
invalid_hypothesis: It is improbable that mary dropped the milk, and Bill went to the office.
hypothesis_assertion: Mary dropped the milk, and Bill went to the office.