context: Chances are slight that Brian is gray. It is almost certain that Julius is a rhino. Chances are about even that Emily is a cat. It is impossible that if either Brian is gray, or Julius is a rhino, then Sandra grabbed the milk. It is probably not the case that if either Julius is a rhino, or Emily is a cat, then Lily is a lion. It is unlikely that if Julius is a rhino, and Emily is a cat, then John put down the apple.
hypothesis: It is highly likely that either Julius is a rhino, or Brian is gray.
valid_hypothesis: It is highly likely that either Julius is a rhino, or Brian is gray.
invalid_hypothesis: We doubt that either Julius is a rhino, or Brian is gray.
hypothesis_assertion: Either Julius is a rhino, or Brian is gray.