I immediately thought of this piece, especially the analysis on the writing style of each person.
On one hand, it is clear that the mathematical tools for confidently attributing authorship of texts were already present without LLMs. But it is striking that LLMs seem to very accurately identify authorship, through whatever process it might be, with no need for a data scientist in the loop.
Other than the uncannyness, I wonder what implications this will have. Public writing is still public; maybe we will require stronger proof of authenticity from an author (but this is arguably in place already; eg. personal websites, social media profiles, etc.). But for, say, public writing that must conserve anonymity, would people pipe their thoughts and writing pieces through a sort of fuzzing (local) LLM, that would strip text of identifying characteristics?
Public writing that must conserve anonymity is either going to disappear or going to require witnesses, notaries, or web-of-trust truestees, i.e., "flesh buffers." In a world with LLMs, every piece of writing that can't authenticate itself in some way will automatically be considered rage bait, eyeball fishing, or, at best, fiction. Just my two cents.