context: There is little chance that Lily is gray. There is a very good chance that Sandra left the milk. There is little chance that Brian is a swan.
hypothesis: Chances are slight that brian is a swan, and Sandra left the milk.
valid_hypothesis: Chances are slight that brian is a swan, and Sandra left the milk.
invalid_hypothesis: It is almost certain that brian is a swan, and Sandra left the milk.
hypothesis_assertion: Brian is a swan, and Sandra left the milk.