context: There is a very good chance that Greg is a lion. It is improbable that Lily is a swan. It is impossible that Winona is a mouse.
hypothesis: It is impossible that lily is a swan, and Winona is a mouse.
valid_hypothesis: It is impossible that lily is a swan, and Winona is a mouse.
invalid_hypothesis: It is probable that lily is a swan, and Winona is a mouse.
hypothesis_assertion: Lily is a swan, and Winona is a mouse.