context: It is improbable that Mary left the milk. It is certain that Julius is a swan. It is improbable that Bill went to the office.
hypothesis: We doubt that either Bill went to the office, or Mary left the milk.
valid_hypothesis: We doubt that either Bill went to the office, or Mary left the milk.
invalid_hypothesis: It is certain that either Bill went to the office, or Mary left the milk.
hypothesis_assertion: Either Bill went to the office, or Mary left the milk.