context: Chances are about even that Mary is in the school. There is almost no chance that Greg is green. There is almost no chance that Julius is white. Chances are about even that if Julius is white, and Greg is green, then Lily is gray. It is probably not the case that if either Greg is green, or Julius is white, then Brian is a rhino. There is a better than even chance that if Mary is in the school, or Julius is white, then John went to the hallway.
hypothesis: It is highly unlikely that either Greg is green, or Julius is white.
valid_hypothesis: It is highly unlikely that either Greg is green, or Julius is white.
invalid_hypothesis: We believe that either Greg is green, or Julius is white.
hypothesis_assertion: Either Greg is green, or Julius is white.