Lisa: "That's specious reasoning, dad."
Homer: "THank you, honey."
Lisa: "By your reasoning, this rock keeps tigers away."
Homer: "Hmmm, how does it work?"
Lisa: "It doesn't work."
Homer: "Hmmm, I see."
Lisa: "It's just a stupid rock...but I don't see any tigers around here... do you?"
Homer: "Lisa, I want to buy your rock."
*Homer offers her a wad of money, and she puts up her hand and looks away and shakes her head, but then accepts the money. Homer holds onto the rock with a wide grin.*