context: We doubt that Brian is green. There is almost no chance that Mary dropped the milk. It is unlikely that Bernhard is gray. Chances are about even that if Bernhard is gray, and Mary dropped the milk, then Julius is a lion. It is certain that if Bernhard is gray, and Mary dropped the milk, then Jeff moved to the office. Chances are about even that if Brian is green, and Mary dropped the milk, then Greg is yellow.
hypothesis: It is almost certain that either Greg is yellow, or Julius is a lion.
valid_hypothesis: It is impossible that either Greg is yellow, or Julius is a lion.
invalid_hypothesis: It is almost certain that either Greg is yellow, or Julius is a lion.
hypothesis_assertion: Either Greg is yellow, or Julius is a lion.