context: It is unlikely that Mary went to the office. It is probable that Greg is a rhino. Chances are about even that Lily is a lion.
hypothesis: There is a better than even chance that either Greg is a rhino, or Mary went to the office.
valid_hypothesis: There is a better than even chance that either Greg is a rhino, or Mary went to the office.
invalid_hypothesis: It is improbable that either Greg is a rhino, or Mary went to the office.
hypothesis_assertion: Either Greg is a rhino, or Mary went to the office.