NOT.5:9 - Consequences

The recipient gains a usable expression and can tell which answers, reconstructions and changes it supports. A loss becomes a reason to choose a supplement, a richer notation or a narrower use instead of an unexplained conversion failure.

Retained information has an access and maintenance cost. A more restrictive reverse policy can protect a source feature while excluding useful edits. These trade-offs remain choices about the work; a round-trip law alone does not settle them.