A.19.UNM:4.4 - Select the result needed by the receiver

For a value comparison, first use the transformed values and their declared preservation/loss basis. Ask whether that basis retains every distinction the comparison requires. Keep original values, refine the normalization, or return the exact missing distinction when it does not.

Form classes only when their set-level result is useful. For an operation on classes, check output compatibility and partial-operation availability. For a query, check class constancy. Name a NormalizationFix only when an already justified class use needs a representative. A representative-selection policy and additional evidence cannot repair a false compatibility theorem.