context: It is certain that John moved to the office. It is probable that Sandra left the apple. We doubt that Greg is a swan. It is probably the case that if Sandra left the apple, and Greg is a swan, then Brian is white. It is probably not the case that if Sandra left the apple, and John moved to the office, then Bill went to the bedroom. Chances are slight that if either Sandra left the apple, or Greg is a swan, then Daniel is in the garden.
hypothesis: It is certain that john moved to the office, or Greg is a swan.
valid_hypothesis: It is certain that john moved to the office, or Greg is a swan.
invalid_hypothesis: It is probably not the case that john moved to the office, or Greg is a swan.
hypothesis_assertion: John moved to the office, or Greg is a swan.