They know nothing about the world and are trying to figure it out from bits of the conversations that have passed through them. High strangeness! 17yr old me loved it.The title is 2 words I think and maybe something like Unreliable Communications.
Stump the Bookseller
New format, same book stumper solving.
I think I might have solved it myself. It sounds like it must have been:
Dial F for Frankenstein by Arthur C Clarke
I was so sure about the title and don’t remember Dial F … at all but it was over 50 years ago!