https://www.nature.com/articles/s41467-019-10933-3
Haven’t read it completely yet, but summary doesn’t seem correct. They actually made an algorithm to check if combinations of characteristics are likely to be unique or not. The most important characteristics are stuff like ZIP code and birth date. (If you live in a fairly small town, you are fairly likely to be the only one in that locality born on that exact year/month/day)
