I had a real-life example of this joke years ago when I was hiking in the Carpathian Mountains with, among others, a mathematician: "There's no landmark in sig

I had a real-life example of this joke years ago when I was hiking in the Carpathian Mountains with, among others, a mathematician: "There's no landmark in sight. Where are we even?" "In Ukraine" "Yes, I know that - what kind of reply is this?" "It's the most precise answer I could come up with."