Anchor: So a socially valuable service is under-rewarded and therefore under-supplied.
Entailed: A socially valuable service should offer more rewards.
Contradiction: A socially valuable service is over-supplied.
Contradiction: Exactly.
Contradiction: A man is sweeping a basement.
Contradiction: There is a beautiful back terrace with patio tables.
Contradiction: The part that is categorized as "Part C"