context: We doubt that Brian is gray. It is highly likely that Julius is green. There is a very good chance that Bill is in the school. There is a very good chance that if Brian is gray, or Bill is in the school, then Winona is a mouse. It is likely that if either Bill is in the school, or Brian is gray, then Jeff dropped the apple. It is likely that if Julius is green, and Brian is gray, then Greg is a lion.
hypothesis: It is unlikely that either Brian is gray, or Julius is green.
valid_hypothesis: We believe that either Brian is gray, or Julius is green.
invalid_hypothesis: It is unlikely that either Brian is gray, or Julius is green.
hypothesis_assertion: Either Brian is gray, or Julius is green.