context: It is impossible that Bill moved to the school. It is unlikely that Mary dropped the milk. It is certain that Greg is white.
hypothesis: It is unlikely that greg is white, or Bill moved to the school.
valid_hypothesis: It is certain that greg is white, or Bill moved to the school.
invalid_hypothesis: It is unlikely that greg is white, or Bill moved to the school.
hypothesis_assertion: Greg is white, or Bill moved to the school.