Jason
The hubjects document on Mondeca Web is now quite old, and needs to be
revisited.
At the time, similar objections about the "no absolute identity" came
from Richard Cyganiak and al. who were very reluctant to follow the
"blank node" track, for technical reasons that I now have to
acknowledge. They were, and you are, absolutely right about the need
of "anchoring" hubjects, and I like the expression a lot.
Hubjects are boats sailing on the ocean, likely to be refurbished like
the Theseus, without losing identity. But they need to be anchored
somewhere to upload and deliver goods and services.
Actually I went to bed last night with this metaphor in mind, and
overnight it came to me that the "anchoring" should be both in human
signs and computer signs, and I came out with a diagram I will try to
share here if I find the "upload" button. Otherwise I will publish it
on my blog.
Bernard