context: It is almost certain that Lily is white. It is probable that Sandra grabbed the milk. It is highly unlikely that Greg is a swan.
hypothesis: It is highly unlikely that lily is white, and Greg is a swan.
valid_hypothesis: It is highly unlikely that lily is white, and Greg is a swan.
invalid_hypothesis: Chances are about even that lily is white, and Greg is a swan.
hypothesis_assertion: Lily is white, and Greg is a swan.