While playing with semantic categorization, I also found that it's also what you write about and how you write (seems obvious, but I wanted to confirm). I took

While playing with semantic categorization, I also found that it's also what you write about and how you write (seems obvious, but I wanted to confirm). I took a year of hn comments and compared my previous account to my current. It was in the top 20 ranked by similarity (out of something like 60k) just by building a custom 'fingerprint' for each user.