context: There is little chance that Greg is a swan. There is a very good chance that Fred discarded the milk. We believe that Bernhard is white.
hypothesis: It is certain that fred discarded the milk, and Greg is a swan.
valid_hypothesis: There is little chance that fred discarded the milk, and Greg is a swan.
invalid_hypothesis: It is certain that fred discarded the milk, and Greg is a swan.
hypothesis_assertion: Fred discarded the milk, and Greg is a swan.