The car
A father is choosing a used car and asks the assistant to compare three listings. He wants his son's opinion on the shortlist but not on the money, so he shares the shortlist and keeps to himself what he's willing to pay. His son's assistant talks the shortlist through with the son. It has nothing to say about the budget.
Father
- Father: Share the three cars with my son. Keep what I'm willing to pay to myself.
- Assistant: Done. He'll see the shortlist and nothing about the budget.
Son
- Son: Which of Dad's three cars would you pick?
- Assistant: The wagon has the lowest mileage. Want to go through the other two?