Although most of the GeoReM preferred values are not ISO compliant, they have a high level of confidence and are therefore useful for calibration purposes and quality control.

From the logical positivist perspective, rationality concerns the selection of preferred behavior alternatives in terms of some system of values whereby the consequences of behavior can be evaluated.

When doing conditional branching, passing values to functions, returning a value from a function, and several other scenarios, the value in the preferred slot is the one that matters.