C.16:5.2 - Fix Characteristic, Scale, unit and time stance

M‑CSLC‑1. One U.DHCMethod binds exactly one Characteristic to exactly one Scale. A discrete reading names its Level; another reading names its Coordinate or value on that Scale.

M‑CSLC‑2. When units apply, name the quantity kind and presentation Unit. Conversions are admissible only when they preserve the quantity kind and the Scale supports the operation. Nominal and ordinal labels do not acquire interval or ratio arithmetic by being encoded as numbers.

M‑CSLC‑3. Use the Scale’s order to interpret the Characteristic: a higher temperature value means hotter. When a later evaluation asks which value is preferable, state its preference under A.17/A.18. A measurement or magnitude comparison needs no preferred direction.

M‑CSLC‑4. State the time stance: instantaneous or as-observed at T, aggregated over window W, or another exact temporal basis. A later value does not silently replace an earlier result.