context: It is highly likely that Brian is a lion. It is probably not the case that Mary went to the office. It is probably the case that Greg is a swan. There is almost no chance that if Brian is a lion, or Greg is a swan, then Lily is a rhino. It is probably the case that if Greg is a swan, and Brian is a lion, then John discarded the milk. It is probably not the case that if either Mary went to the office, or Greg is a swan, then Bernhard is white.
hypothesis: There is a better than even chance that either Mary went to the office, or Greg is a swan.
valid_hypothesis: There is a better than even chance that either Mary went to the office, or Greg is a swan.
invalid_hypothesis: It is impossible that either Mary went to the office, or Greg is a swan.
hypothesis_assertion: Either Mary went to the office, or Greg is a swan.