context: It is certain that Lily is white. It is highly unlikely that Sandra took the football. It is unlikely that Julius is white.
hypothesis: It is certain that lily is white, and Sandra took the football.
valid_hypothesis: It is highly unlikely that lily is white, and Sandra took the football.
invalid_hypothesis: It is certain that lily is white, and Sandra took the football.
hypothesis_assertion: Lily is white, and Sandra took the football.