context: Chances are slight that Brian is a lion. It is unlikely that Mary moved to the office. It is probable that Greg is a swan. There is a very good chance that if Mary moved to the office, and Greg is a swan, then John dropped the apple. We believe that if either Mary moved to the office, or Brian is a lion, then Gertrude is a mouse. It is almost certain that if Mary moved to the office, or Brian is a lion, then Bernhard is white.
hypothesis: There is a very good chance that mary moved to the office, and Gertrude is a mouse.
valid_hypothesis: There is little chance that mary moved to the office, and Gertrude is a mouse.
invalid_hypothesis: There is a very good chance that mary moved to the office, and Gertrude is a mouse.
hypothesis_assertion: Mary moved to the office, and Gertrude is a mouse.