context: It is likely that Mary moved to the garden. It is probably not the case that Brian is a swan. We doubt that Greg is a rhino.
hypothesis: There is little chance that mary moved to the garden, or Brian is a swan.
valid_hypothesis: There is a very good chance that mary moved to the garden, or Brian is a swan.
invalid_hypothesis: There is little chance that mary moved to the garden, or Brian is a swan.
hypothesis_assertion: Mary moved to the garden, or Brian is a swan.