How the engine works. Shepherd asks before the engine runs — up to three follow-ups, never more (press "just walk" any time). Then the shaped question goes through the gates: two or three witnesses (no claim passes on one source), the alignment read, and sixty-plus domain verifiers. What survives is laid out as cards — each carries its source and its authority tier. The trail is the reasoning. If the engine vanished tomorrow, the cards would still teach.