Anchor: To an economist, it's clear why people with limited sexual pasts choose to supply too little sex in the  Their services are underpriced.
Entailed: It's clear why people who haven't had a lot of sex don't have much in the future.
Contradiction: It's not clear why people who haven't had a lot of sex don't have much in the future.
Contradiction: the man is asleep
Contradiction: A child sits in the woods birdwatching
Contradiction: Nobody is looking.
Contradiction: A man is putting on a performance.