The erroneous priorities effect: why the problem a group ranks highest is usually downstream, and what a simulated room shows about voting versus mapping causes.

Why a split vote on a causal question should escalate rather than fail quietly, and how referring it to other groups protects a map against people steering it.

Why a few shortlist places should be reserved for overlooked ideas backed by a source, and what that does for a room that ranks by feeling.

How thousands of people in small rooms reach one causal map: separate walls, shared questions, claims that travel, wordings merged only by their authors, and maps folded into one.

Every number behind True Causes, from simulations that ship with it: causes found by voting versus mapping, group size, the error cliff, and what an attacker inside the room can do.

Warfield, Christakis, Laouris, Dye, Ashby and Miller: the fifty years of research True Causes builds on, where it departs from it, and how it differs from Polis and the Habermas Machine.

Municipalities, large organisations, regulators, unions and workforces, universities, incident reviews: what a causal map with its disagreements kept is useful for, and what it does not do.