According to posters on the subreddit for the blog, he emailed people who had been to in-person meetups for the blog. https://www.reddit.com/r/slatestarcodex/c

According to posters on the subreddit for the blog, he emailed people who had been to in-person meetups for the blog. https://www.reddit.com/r/slatestarcodex/comments/hbk52q/psa_apparently_a_nyt_reporter_is_writing_a_piece/fvbxd31/ https://www.reddit.com/r/slatestarcodex/comments/hbk52q/psa_...