context: It is probable that Mary moved to the office. It is certain that Bill went to the kitchen. We believe that Greg is a lion.
hypothesis: Chances are about even that either Greg is a lion, or Mary moved to the office.
valid_hypothesis: Chances are about even that either Greg is a lion, or Mary moved to the office.
invalid_hypothesis: It is almost certain that either Greg is a lion, or Mary moved to the office.
hypothesis_assertion: Either Greg is a lion, or Mary moved to the office.