context: It is probably not the case that Brian is a lion. It is probable that Julius is a swan. There is little chance that Jessica is a mouse.
hypothesis: It is impossible that either Julius is a swan, or Jessica is a mouse.
valid_hypothesis: It is probable that either Julius is a swan, or Jessica is a mouse.
invalid_hypothesis: It is impossible that either Julius is a swan, or Jessica is a mouse.
hypothesis_assertion: Either Julius is a swan, or Jessica is a mouse.