The "natural ID" for people design reminds me of a story from a state department of education: They had two students, both named John Smith Jr. They were identical twins and attending the same class.
They had the same birth date, school, parents, phone number, street address, first name, last name, school, teachers, everything...
The story was that their dad was John Smith Sr in a long line of John Smiths going back a dozen generations. It was "a thing" for the family line, and there was no way he was going to break centuries of tradition just because he happened to have twins.
Note: In very junior grades the kids aren't expected to memorise and use a student ID because they haven't (officially) learned to read and write yet! (I didn't use one until University.)
They had the same birth date, school, parents, phone number, street address, first name, last name, school, teachers, everything...
The story was that their dad was John Smith Sr in a long line of John Smiths going back a dozen generations. It was "a thing" for the family line, and there was no way he was going to break centuries of tradition just because he happened to have twins.
Note: In very junior grades the kids aren't expected to memorise and use a student ID because they haven't (officially) learned to read and write yet! (I didn't use one until University.)