Your local electronics store has just started selling time machines,anywhere doors, and invisibility helmets. You can only afford one. Which of these do you buy, and why?
Of the items on sale, I can use the doors, the time machines and invisibility helmets are of no use to me. The doors I can use, the doors I have are old and need replacement, I’d like to have new doors, they’d change the look of the house from ugly to tolerable, If I want to sell it there’ll be plenty of buyers,but old doors will bring down the price of the house, because they’re not attractive.
I have no use for time machines, it might be of use to a film producer, the invisibility helmet is another thing which is good for other people, for me it serves no purpose.