This is an interesting discussion going on here.
I'd like to comment, however, that when considering the epistemology behind "identity" (latin idem), I don't think it exactly refers to the "sameness" with those around us (although it's indeed valid to talk about "national identity" and similar constructs), but more precisely it refers to the relationship towards everything that is "the same", that is exactly one-self, or the set of "things" that are able to define what (or more precisely which) this self is. It is a reflective relationship, or a set of relationships with one(or about one)self. Thus it makes perfect sense to create a DID as a relationship with oneself for setting up a "persona" within the context of the Sovrin network.
However, there's another perspective that I'd like to share about identity or this quality of sameness, and it's about identity as the set of "things" (or features, or facts, or claims) that allow two different entities to be able to refer to a third one and somehow be sure they're talking about the same (idem) person. That's why we have names, because names act as "identifiers".
I think the latter aspect is mostly what identity is about in the context of society and laws. Governments issue ID cards, for example, to assign a number through which each person can be properly identified, which is to say that any number of entities referring to a single identifier can be sure to know they're referring to the same individual,
This last point is something that, at least personally, clashes once in a while with the concept of "full anonymity" or the creation of a DID per relationship... I understand these are features that make a lot of sense for guaranteeing self-sovereignty, however, I'm also trying to see things from a KYC perspective: does it really make sense to be completely anonymous or have a different "face" per individual relationship when my goal as a person (in this context) might be to be able to prove the consistency of "identity data" among multiple institutions?...
My current guess is that although creating a DID per relationship is a powerful and necessary feature, also "relationships" not only occur between entities, but also between entities and contexts. Therefore I could be using the same face within the financial context (even towards multiple different banks), and another "persona" within other contexts, saving for myself the correlational possibility.
It seems to me that correlation might be a desired feature in some contexts... What are the views of the Sovrin community with regard to this?