context: We believe that Brian is a swan. It is improbable that Lily is yellow. It is highly unlikely that Greg is a rhino.
hypothesis: It is improbable that lily is yellow, and Brian is a swan.
valid_hypothesis: It is improbable that lily is yellow, and Brian is a swan.
invalid_hypothesis: It is probably the case that lily is yellow, and Brian is a swan.
hypothesis_assertion: Lily is yellow, and Brian is a swan.