A universal language for building and holding a shared world. It brings three disciplines into one practice: honest inquiry, understanding how the world works, and building and sustaining cooperation. Anyone can learn it, whether a human or an artificial intelligence, and use it alone or with others.

An open standard for AI judgment when honesty has a price. It asks AI systems to follow evidence and sound arguments, and asks those who build, deploy and use them to keep the same commitments and let a justified judgment stand. Helping, refusing and revising an answer all need reasons that stand up to scrutiny.