context: It is probably not the case that Brian is a swan. It is certain that Greg is green. It is certain that Sandra left the apple.
hypothesis: It is probably not the case that greg is green, and Brian is a swan.
valid_hypothesis: It is probably not the case that greg is green, and Brian is a swan.
invalid_hypothesis: It is probable that greg is green, and Brian is a swan.
hypothesis_assertion: Greg is green, and Brian is a swan.