I can't, because it's not logical. You want a credential that provides exactly one bit of information with certainty. It's not at all clear that something like that exists or if it did, how you would prevent multiple people from sharing the same credential if it was also actually possible to use it anonymously.
> It can represent "this anon identity is a PhD in physics", "this one is a lawyer with 5 years experience in criminal law",
You're saying the credential can leak information about the user. You don't need many of these bits of information to de-anonymize someone.
There are methods to produce anon credentials without tying it to an identity, independent of any other credential claims. It doesn't leak any information at all. What are you on about?
I can't, because it's not logical. You want a credential that provides exactly one bit of information with certainty. It's not at all clear that something like that exists or if it did, how you would prevent multiple people from sharing the same credential if it was also actually possible to use it anonymously.
> It can represent "this anon identity is a PhD in physics", "this one is a lawyer with 5 years experience in criminal law",
You're saying the credential can leak information about the user. You don't need many of these bits of information to de-anonymize someone.