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?

The attribution is likely incorrect. People have been trying to accuse him for many years, and the evidence is not very strong. This article is the strongest yet, but still commits many stylometric fallacies, and other kinds.

This is an old claim, and one that can't be proven.