20 years ago in grad school we were doing a very early iteration of this where we built Markov chains with Shakespeare's plays and wanted to produce a plausibly "Shakespearian" clause given a single word to start and a bearish professor said "the more plausible it gets the more I worry people might forget plausibility is all that it promises".

(There was also a much earlier piece of software that would generate semi-intelligible Kant or Hegel one sentence at a time, though that was through a series of a priori generation rules and a large at the time dictionary of stock phrases. I wonder what ever happened to that.)