I keep banging on about trust being the top layer in this picture, so I thought I should share and explain it.
Semantic Web Levels (Figure 7 from W3C Kick Off in 2001)
No amount of proof, logic or science (not even computer science) can bundle trust within its communications. Trust comes from care, from the humans, not the systems, and must be a separate layer that never loses the human connection.
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Post Note: And of course, constructing the chain of trust from original trusted sources to instances anywhere else in the web, is what Distributed Leger Technology (DLT, Blockchain, etc) is about. And the more we pile stuff into the inhuman layers (AI anyone?) the harder it gets to maintain that humanity, that trust.
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That is an extremely interesting image.