Anchor: Laibson's imperfect altruists face a far subtler problem--they're not just weighing costs and benefits, they're engaged in games of strategy against their future selves.
Entailed: Laibson has alturists that follow him.
Contradiction: Laibson has selfish people that follow him.
Contradiction: It's been terrible talking to you for ten minutes.
Contradiction: The nurses are not old.
Contradiction: The short time allows them to see only one region.
Contradiction: Always, sweetheart, yes, goodbye.