context: We believe that Mary got the milk. There is a very good chance that John dropped the apple. We doubt that Brian is white. It is probably not the case that if Brian is white, and Mary got the milk, then Jeff moved to the office. There is a very good chance that if either Brian is white, or Mary got the milk, then Greg is yellow. There is a very good chance that if Brian is white, or Mary got the milk, then Julius is gray.
hypothesis: It is impossible that greg is yellow, and Julius is gray.
valid_hypothesis: Chances are about even that greg is yellow, and Julius is gray.
invalid_hypothesis: It is impossible that greg is yellow, and Julius is gray.
hypothesis_assertion: Greg is yellow, and Julius is gray.