I think the explanation comes later in the article:

"It is graph-native - not a vector database with graph features bolted on, not a document store with a graph view, but a graph at it's core - because the multi-hop question intelligent systems actually have to answer cannot be answered by cosine similarity over chunked text, no matter how much AI you paste on top."

And

"It has a deterministic harness around its stochastic components. The language model proposes but the scaffolding verifies. Every inference, every tool call, every state change is captured in an immutable ledger as first-class data and this is what makes non-deterministic components safe to deploy where determinism is required."