context: It is certain that Emily is a mouse. It is probable that Brian is a swan. It is likely that Lily is a swan.
hypothesis: It is impossible that emily is a mouse, and Brian is a swan.
valid_hypothesis: It is probable that emily is a mouse, and Brian is a swan.
invalid_hypothesis: It is impossible that emily is a mouse, and Brian is a swan.
hypothesis_assertion: Emily is a mouse, and Brian is a swan.