context: We believe that Bernhard is a swan. It is certain that Mary left the apple. There is little chance that Greg is yellow.
hypothesis: We believe that mary left the apple, and Bernhard is a swan.
valid_hypothesis: We believe that mary left the apple, and Bernhard is a swan.
invalid_hypothesis: It is unlikely that mary left the apple, and Bernhard is a swan.
hypothesis_assertion: Mary left the apple, and Bernhard is a swan.