Anchor: But if monogamy is at odds with human nature, how do you keep it from metamorphosing into serial monogamy?
Entailed: But if single relationship is not normal, how do you keep it from changing into serial single relationships?
Contradiction: Monogamy is perfectly in line with known human nature. 
Contradiction: Most of the people are not wearing any clothes.
Contradiction: Auditors should follow AICPA's recommendations when giving opinions about internal control over financial reporting.
Contradiction: A woman is swimming in the ocean.
Contradiction: There are several people in this picture.