context: It is probably the case that Mary went to the hallway. There is almost no chance that Brian is a swan. There is a better than even chance that Greg is a lion.
hypothesis: There is almost no chance that greg is a lion, and Brian is a swan.
valid_hypothesis: There is almost no chance that greg is a lion, and Brian is a swan.
invalid_hypothesis: It is highly likely that greg is a lion, and Brian is a swan.
hypothesis_assertion: Greg is a lion, and Brian is a swan.