context: We doubt that Brian is a lion. There is a very good chance that Julius is green. We doubt that Greg is a swan.
hypothesis: It is probably not the case that either Greg is a swan, or Brian is a lion.
valid_hypothesis: It is probably not the case that either Greg is a swan, or Brian is a lion.
invalid_hypothesis: It is likely that either Greg is a swan, or Brian is a lion.
hypothesis_assertion: Either Greg is a swan, or Brian is a lion.