What should never go into the public brain?

Private pricing arrangements, login details, API keys, confidential client data, internal operations and unapproved claims should not be published in the public brain. 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. Used well, this becomes a clear business conversation rather than a generic AI sales pitch. 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.