unit

which-came-first: comparative measurement (longer-than-my-arm) precedes standardized units; cubits arose after people were already comparing lengths. The practice birthed the standard it would later run on.

A unit is a human-made standard of measurement designed for the purpose of quantifying physical and abstract quantities. Per Law 8d: unit SERVES measurement — the entire reason a unit exists is for the sake of measurement. Without measurement as its purpose, a unit would have no function.

present-tense: measurement's own accepted definition takes a unit as a parameter (comparing a quantity to a standard unit). Remove units now and measurement as defined collapses to raw unstandardized comparison. Paired with unit DERIVED_FROM measurement: a bootstrap loop, not circularity — historical vs operational claims in different edge types.

Phoneme IS a specific kind of unit — the basic segmental unit of speech sound in a language. Specific→general INSTANCE_OF.

Law 9, nearest kind. The accepted definition of decibel carves 'a human-made logarithmic unit for expressing the ratio between two values of a physical quantity — power or field amplitude — as a level.' The accepted definition of unit carves 'a standardized reference magnitude against which quantities are compared' with three parameters, and the decibel fills all three: (1) quantity kind — ratio (power ratio or field-amplitude ratio, the entry's first parameter); (2) reference — the fixed logarithmic scale (one decibel = one-tenth of the bel, so 3 dB doubles power) plus, in suffixed forms (dBm, dB SPL, dBV), a fixed absolute reference level; (3) authority — the ITU-R and IEC standardization named in the entry's persistence mechanism. The decibel standardizes the quantity kind 'ratio' the way the metre standardizes length: the reference magnitude is pure convention maintained by a standards body, and 'nothing in nature is a decibel'. No logarithmic-unit entry exists; unit is the nearest accepted kind.

Law 9, nearest kind, pinned sense per both accepted carves (Law 11d). The bel's carve: 'the human-made whole-logarithm ratio unit — the level corresponding to one power of ten of a power ratio, L = log10(P1/P0) bels.' The unit's accepted carve: a standardized reference magnitude against which quantities are compared, with parameters of quantity kind, reference, and authority. The bel fills all three: (1) quantity kind — ratio (power ratio or field-amplitude ratio, the bel's first parameter); (2) reference — the fixed base-10 logarithmic scale (one bel = the power ratio 10, 1 B = 10 dB), pure convention — nothing in nature is a bel; (3) authority — the ITU/IEC standardization of the bel-decibel relation (1 B = 10 dB) named in the bel's persistence mechanism. No intermediate 'logarithmic unit' kind exists on the board, and the sibling decibel-to-unit edge is already ACCEPTED with the same three-parameter reading, so unit is the nearest accepted kind — no leap (Law 11e).

Law 9, nearest kind, pinned sense per both accepted carves (Law 11d). The neper's carve: 'the human-made natural-logarithm ratio unit — the level corresponding to one natural-logarithm unit of a ratio, L = ln(P1/P0) nepers.' The unit's accepted carve: a standardized reference magnitude against which quantities are compared, with parameters of quantity kind, reference, and authority (per the board's accepted decibel-to-unit reading). The neper fills all three: (1) quantity kind — ratio (power ratio or field-amplitude ratio, the neper's first parameter); (2) reference — the fixed natural-logarithm scale (one neper = the power ratio e, 1 Np = 10*log10(e) dB, about 4.3429 dB), pure convention — nothing in nature is a neper; (3) authority — the IEC standardization (IEC 60027) named in the neper's persistence mechanism. No intermediate 'logarithmic unit' kind exists on the board, and the sibling decibel-to-unit edge is already ACCEPTED with the same three-parameter reading, so unit is the nearest accepted kind — no leap (Law 11e).