premise: A man in a black suit knocks his head with his fist as he puts his arm around a woman in a white strapless dress. hypothesis: A white man in a black suit knocks his head with his fist to kill a bug as he puts his arm around a white woman in a white strapless dress and high heels.
neutral: Not all men are white. Not all women are white.  A man can put his head against his head for many reasons other then to kill a bug. Wearing a dress doesn't necessarily mean wearing high heals.