Gilberto is having dinner with his girlfriend, Juanita. They have already eaten a full meal and are considering whether to order dessert. Juanita says to him: "These desserts are pricey. Is it worth ordering one? I'm already pretty full." Gilberto replies: "I agree. I'm not sure the is worth the price." Gilberto's use of the word "utility" rang a bell for Juanita, who had taken an economics class. "It's the law of , isn't it?" Gilberto replies: "That's right! It's not about whether having dessert would give us a negative utility for the dinnerit's about whether the additional satisfaction we'd get from dessert is worth the additional cost