I remember a scene from one of the Hitchhiker books:
Arthur Dent (I guess) talks to an alien who says that the Earth was this very backwards planet. Arthur says, well, this is not true, we had plenty of amazing technology (like for example submarines, sandwich makers, nuclear energy, television) - the alien says: oh that's interesting, how does this technology work, can you explain or build it? Which Arthur, of course, can not.
I have been looking for this scene in all 5 books, on paper and digitally, and can not find it anywhere. Where is this scene from?