context: It is almost certain that John got the milk. It is improbable that Brian is a swan. There is little chance that Julius is white.
hypothesis: There is almost no chance that julius is white, and Brian is a swan.
valid_hypothesis: There is almost no chance that julius is white, and Brian is a swan.
invalid_hypothesis: It is certain that julius is white, and Brian is a swan.
hypothesis_assertion: Julius is white, and Brian is a swan.