context: We believe that Mary picked up the apple. It is probable that John is in the office. It is probably the case that Sandra left the football.
hypothesis: Chances are about even that john is in the office, and Mary picked up the apple.
valid_hypothesis: Chances are about even that john is in the office, and Mary picked up the apple.
invalid_hypothesis: It is certain that john is in the office, and Mary picked up the apple.
hypothesis_assertion: John is in the office, and Mary picked up the apple.