context: It is impossible that John went to the office. There is little chance that Greg is a swan. It is certain that Brian is green.
hypothesis: It is certain that john went to the office, and Greg is a swan.
valid_hypothesis: It is impossible that john went to the office, and Greg is a swan.
invalid_hypothesis: It is certain that john went to the office, and Greg is a swan.
hypothesis_assertion: John went to the office, and Greg is a swan.