If you can wield an ephemeral and verifiable token which asserts your humanness, hierarchically derived from a certificate privately issued to you by one of hopefully a healthy number of well known authorities, you can participate within circles of the human web without revealing anything else about your identity (name, a/s/l, etc)
But, outside of this enclave you can also interact with AI without revealing whether in fact you too are AI.
In this way the internet can develop a more sensitive immune system where it is difficult for human systems to be perverted by Sybil attacks.