Chronic Drift

Definition and scope

Chronic Drift is the designation applied to drift events which have persisted beyond the interval at which Standard Drift ceases to be considered corrective. The threshold is not fixed: it is cited as 40 days by Concordance 118, as "one winter, at minimum" by Concordance 44, and as "however long it takes for someone to notice and file" by the standing practice of the Registry of Lingual Drift. Events meeting any of these tests are entered into the register of permanent anomalies and thereafter fall under the oversight of the Division of Chronic Reconcilement. The term should not be confused with Drift-Sheen, which is a residue rather than a duration, nor with Benign Drift, which describes intent rather than persistence.

Recognition

Recognition of chronicity is a two-stage matter. The first stage is measurement, performed by the Chamber of Measured Drift, which records the event in negative Standard Drift Units at intervals stipulated by the Chamber's own ordinance. The second stage is acknowledgment, performed administratively, and this is where most disputes arise. An event may be measured for years without ever being acknowledged as chronic, because acknowledgment requires that a clerk produce a declaration of permanence, and declarations of permanence are themselves subject to drift. The Winter Case of Floor 3,201 is illustrative. A shelf of catalogued air began, in the second week of that winter, returning readings one syllable ahead of the question put to it. The Chamber recorded a widening deviation over eleven weeks. The shelf was not formally declared chronic until the following autumn, by which time three separate clerks had recorded it as "expected behaviour" in their duty notes, and one of them had amended the floor's name to match it. The amendment was never reversed.

Subtypes

Chronic Drift is not a single phenomenon but a classification covering several distinct patterns that happen to share a duration. The principal subtypes are: - Chronic Nominative Drift, in which a subject's recorded name has been superseded for so long that the original appears to be a transcription error. See Nominative Drift and Lingual/Nominative Drift. - Chronic Semantic Drift, in which the meaning of a term has migrated further than its own citation can follow. See Semantic Drift. - Chronic Echo-Locus Drift, in which a location continues to answer to two floor numbers. - Chronic Azurite Drift, a rare and poorly understood subtype catalogued on Floor 77. Retroactive Drift may become chronic, though this is disputed; see below.

The 3,267 ruling

The classification's modern form dates to the ruling of the Division of Chronic Reconcilement in 3,267, which held that chronicity is a property of an anomaly's permanence rather than of its source. The ruling settled three decades of argument about whether drift introduced by an Anti-Drift Measure could itself become chronic. It could, the Division held, and frequently did — a point which the Chamber of Measured Drift has resisted since, on the grounds that measuring a correction for drift makes its own figures unintelligible. The ruling also confirmed that the Quiet Hour extension enacted by Clerk Anselm was chronic at the time of adjudication, notwithstanding that the extension itself had already been declared improper. The Division's language on this point has been quoted often:

"The impropriety of an act does not shorten the interval of its persistence. A thing done wrongly for nine years is still done."

— Division of Chronic Reconcilement, ruling of 3,267, clause 4

Contradictions in the record

The Concordances disagree, as usual, and the disagreement is instructive. Concordance 118 states plainly that chronic drift is uncorrectable and should be registered, not fixed. Concordance 119 — amended twice, read less often — states that chronic drift is "merely Standard Drift of unusually good constitution" and therefore remains within the remit of ordinary correction. Both are cited. Neither has been withdrawn. The Division has resolved this in practice by treating the contradiction itself as a chronic anomaly, registered in 3,271 under the same rubric as any other. The record therefore contains a permanent entry asserting that permanent entries are permanent, and a second permanent entry asserting that they are not. Scholars at the Chronic Administrative Continuity desk have noted, without drawing a conclusion, that the second entry has been cited four times more often than the first. A smaller dispute concerns Day 3 and whether the events of that day count as chronic or merely as cumulative. The Registry currently lists them as cumulative, with a marginal note reading "pending."

Visiting and handling

Readers wishing to consult the register of chronic anomalies may do so at the desk on Floor 3,201 during the hours posted at the stair. Visitors are reminded that chronic anomalies may be observed but not corrected on site, and that the shelf of catalogued air does not answer to whispered questions after the fourth hour of the evening.