But Markov chains have never produced credible sentences. They produce crazy schizophrenic sentences that begin talking about one thing and end up talking about something entirely different because they went on farther than their lookback. Just look at the example in your link:

> It looks like Reagan is holding back the arms of the American eating public have changed dramatically, and it got pretty boring after about 300 games.

That's not going to get past anyone who reads it in any context. The method here was to copy entire well-formed sentences from existing reviews.