context: It is improbable that Brian is a lion. It is impossible that Greg is a swan. We doubt that Mary moved to the office.
hypothesis: It is probably not the case that either Brian is a lion, or Mary moved to the office.
valid_hypothesis: It is probably not the case that either Brian is a lion, or Mary moved to the office.
invalid_hypothesis: It is probable that either Brian is a lion, or Mary moved to the office.
hypothesis_assertion: Either Brian is a lion, or Mary moved to the office.