antirez 1 hour ago. 1277 views. About three years ago I saw a quite curious and interesting post on Hacker News. A student, Christopher Tarry, was able to use cosine similarity against a vector of top words frequencies in comments, in order to detect similar HN accounts — and, sometimes, even accounts actually controlled by the same user, that is, fake accounts used to uncover the identity of the writer. This is the original post: https://news.ycombinator.com/item?id=33755016 I was not aware, b...