This seems like a very open ended problem still. Surely there is much more hidden information in the way people write which has not been utilized widely yet. I’

This seems like a very open ended problem still. Surely there is much more hidden information in the way people write which has not been utilized widely yet. I’m reminded of when 80% accuracy in computer vision classification nets were state of the art. You need more data. And, I think, more transient data. Cliques develop lingo that falls in and out of fashion quickly. For instance I know why I started one of the above sentences with “Surely” (not something I did often until recently) and it could be traceable to at least one specific internet community if you had all the conversation data. A few more layers like that in a neural net and you’ve got a pretty good fingerprint.