MMP.9:9 - Consequences

A reduced model can expose which information determines the answer and make repeated calculation cheaper. Bounds can support a decision before a full reduced trajectory is available. Derivation also identifies a reusable limitation: which initial conditions, inputs or new questions require restoring discarded content.

The cost can move into initialization, memory, closure construction or verification at the required horizon. Where that cost exceeds using the source model, the larger account remains a useful option.