[Rebelgecko]

Was that the same book that had the concept of (paraphrasing using modern terminology) doing interstellar communications by sending back and forth LLMs trained on the people who wanted to talk, prompted to try and get a good business deal or whatever?

[alex-robbins]

That happened in Redemption Ark by Alastair Reynolds (2002), though of course the idea may also have been used before or since.

[DoneWithAllThat]

This idea was also used in The Algebraist.