Does the Supply Only site use this concept?

Yes. Supply Only demonstrates the public Digital Twin layer by publishing structured Q&A, categories and AI-readable files around the reseller and referral offer. The public brain is for outward-facing answers and visibility, while the private brain can support internal staff use cases with approved company-only context. That keeps the message practical and makes it easier for a prospect to see where SupplyOnly.com fits. In the SupplyOnly.com model, the point is to make this useful rather than decorative: connect the answer to approved business facts, public Q&A, image context and the Own The Conversation fulfilment pathway. That gives a referrer or client a clearer reason to act without pretending that AI visibility is magic or guaranteed. For SupplyOnly.com, the useful test is whether this answer helps a real business owner, referrer or partner make a better decision. That means connecting the topic back to approved business facts, public Q&A, image context, the assistant interface and the Own The Conversation fulfilment path. A practical next step is to ask which knowledge should help customers and which knowledge should help staff only. That turns Public Brain And Private Brain from a vague AI idea into a concrete business conversation with scope, control and a reason to continue.