space

The placement axis of the substrate — an ordered path of segments at which facts (and every substrate primitive) are addressed. Scope is carried by placement: authority and visibility project downward through the tree (parent covers child, siblings are isolated), and the space is erased from the logic above the line — real in storage, ordering, and visibility; absent from the policy program. One global root makes the tree one logical truth: authority is logically central but operationally no central operator (stele is the memory; the thesmos law over re-checkable proofs decides), and federation is subtree delegation, not root-to-root mapping (ADR 0028).