context: There is almost no chance that John took the milk. It is certain that Brian is a swan. We believe that Mary went to the office.
hypothesis: We believe that john took the milk, or Mary went to the office.
valid_hypothesis: We believe that john took the milk, or Mary went to the office.
invalid_hypothesis: We doubt that john took the milk, or Mary went to the office.
hypothesis_assertion: John took the milk, or Mary went to the office.