context: It is probable that Greg is yellow. Chances are about even that Bill is in the park. We doubt that Brian is a swan.
hypothesis: It is probably not the case that greg is yellow, and Bill is in the park.
valid_hypothesis: It is probably not the case that greg is yellow, and Bill is in the park.
invalid_hypothesis: It is probably the case that greg is yellow, and Bill is in the park.
hypothesis_assertion: Greg is yellow, and Bill is in the park.