Logic Unplugged
Many years ago, a friend of mine used to work as a civilian research scientist at a local Naval base. One day, they had a new machine delivered and needed to fit an electrical plug to it. So, he went down to the store to get one. The following conversation took place between my friend and the store assistant:
Friend: “I need a mains plug, please.”
Store Assistant: “Sorry, but we haven’t any left.”
Friend: *Looking past the assistant at the shelves behind.* “But there’s one there on the shelf.”
Store Assistant: “Yes, but you can’t have it.”
Friend: “Why not?
Store Assistant: “Because it’s the last one, and somebody might want it.”
Friend: “…?”
He gave up, went off base, and bought one at a local hardware store.
