A.6.3.NAR:10 - Rationale

Narrative makes non-linear structure usable by giving readers a path through events, mechanisms, evidence, options, architecture decisions, or prerequisites. That strength is also the risk: a well-formed story can make a source look simpler, more certain, more complete, or more permissible than it is.

The narrow reusable move is therefore reader-first and progressive. Choose structure for a use, order it, connect it, draft the account, and expose loss and return. Exact n : X -> Y is the stronger description of that move when a receiving use needs claim-level identity; it is not the entrance fee for every explanation.