NOT.5:10 - Architectural Rationale
Translation changes the means through which an operation is performed. Its success therefore depends on both interpretation and the receiving operation. Two expressions may be interchangeable for counting and different for performing an ordered sequence.
The constructive loss test gives a local reason for a limit: when one target stands for two sources with different required answers, the target cannot by itself select the answer. Supplementary information repairs that failure only through a defined recovery operation.
Backward change is a further construction. Keeping one source feature fixed and changing another can realize the same target edit as a different policy. This is why two-way translation needs its own use conditions, and why continuing coordination of shared views belongs with NOT.6.