Identity is horrendously complicated though,
Its not a simple concept like pseudo cash. For the naive, it seems just as simple as currency : 1 person, 1 pseudo dollar each needs to be identified, what's the difference.
Well, once you have had real time experience of the horrendous complexities that you run into with some of the strange things that folk do who are, shall we say, not totally assimilated into the mainstream of society, well... As ever its the boundary conditions and exceptions that get you... And the trouble with something like identity is it really does need to cover 100% of cases.
I''m sure plenty of commentards will pile in saying, no of course its not complicated, don't be ridiculous. But, as ever, they'll be the ones without the real world experience.