Provisional Architectonics

Provisional Architectonics is the branch of structural scholarship concerned with buildings, corridors, stairwells and annexes that are not yet — or not entirely — admitted to exist. It is distinguished from Ambiguous Architectonics by a narrow but fiercely defended line: the ambiguous scholar asks whether a structure is real, while the provisional scholar works on structures whose reality has been ruled sufficient for the present and no further. The distinction was fixed in the Treatise on Latent Architectonics and has been litigated at intervals ever since, most recently before the Triage Subcommittee for Ambiguous Architectonics, which declined to disturb it.

Origins and the Torval Scale

The discipline descends directly from the Torval Scale, the seven-point instrument set out by Torval in the Treatise on Latent Architectonics for rating a structure's "hold upon the plan." Torval reserved points one through four for admitted architecture and point seven for what he called "the plainly wished-for." Points five and six he left unassigned, with a marginal note reading, in the standard recension, "here the surveyor will find work enough." Provisional Architectonics is the study of points five and six.

The phrase itself appears first in an inventory return filed by the Clerks of the Latent in the winter of the year the archive records as 4,112, describing a stair on the eastern spiral that "answers to inspection in the morning and not in the afternoon." The return was accepted, filed under a provisional heading, and never amended. Codicillary Inertia, the governing rule of the Master Survey of Unrealized Architectonics, has kept it there.

The Latent Resonator and field practice

Field survey in the discipline is conducted with the Latent Resonator, adapted for architectural use from the models described in the Treatise on Latent Architectonics. The instrument reads the vibrational substrate of matter and reports a figure the surveyor compares against the Torval Scale. Practice is unglamorous. A resonator carried onto a provisional floor must be recalibrated at the threshold, and no reading taken within the first forty paces is entered in the record. Surveyors are instructed not to address the corridor while the instrument is warm.

Discrepancies between instruments are common and are not treated as instrument error. Where two resonators disagree by more than two points on the Scale, both readings are retained and the structure is designated bifurcate, a status that carries its own annex and its own delays. The Provisional Protocol governs the intervals at which bifurcate structures must be re-inspected; in practice, most are re-inspected when someone remembers.

Provisional Floors and the 4,461 dispute

A provisional floor is one bearing a number and a name but no settled position in the vertical sequence. Clause 5 permits such a floor to be entered, catalogued and occupied, provided that nothing is carried off it. The clause is short and the disputes concerning it are not.

The most cited is the disagreement of 4,461 between the Clerks of the Latent and the Office of Vertical Registry over Floor 2,208, a reading room that shifted one storey in the course of a single afternoon while occupied by nine clerks and a cart of returns. The Clerks held that the floor had never moved and that the Registry's measurement had; the Registry held the reverse, citing its own instruments and the testimony of the cart. The matter turned on whether the cart had been loaded, since a loaded cart on a shifting floor raises questions of removal under Clause 5. It had been loaded. The Triage Subcommittee for Ambiguous Architectonics heard argument for three sessions and issued a remand, which under Precedent Sigma12 resolved nothing and postponed everything.

"A structure that has not settled may nonetheless be shelved; what may not be shelved is the question of where."

— Clerks of the Latent, Third Recension, Annex 11

Status, seals and the Provisional Sigil

Provisional status is conferred by the affixing of the Provisional Sigil (Ψ) to the structure's entry and, where the structure has a door, to the door. A sigil once affixed is not removed; it is superseded, which requires a further sigil and a Provisional Ratification signed by two Librarians, one of whom must have visited the floor. Perpetual Provisional Status is the recognised condition of entries that have accumulated sigils without resolution, and the archive holds some four hundred of these, the oldest dating to the founding of the Librarian Provisional Arris.

Scholars disagree sharply on what provisional status asserts. The Commentaries on the Master Survey, a cautious work, holds that it asserts nothing and merely keeps a question open. The Clerks of the Latent hold, in their Third Recension, that it asserts existence "for all purposes short of the final." The Office of Vertical Registry has never committed itself in writing. The contradiction is not considered urgent, as the practical consequences of the two positions differ only in the matter of removal, and the Clerks have not removed anything since 4,388.

Criticism and present standing

Critics within Ambiguous Architectonics argue that Provisional Architectonics is a way of never concluding an inquiry, and that the discipline's growth in the last nine centuries measures not the Tower's instability but the surveyors' reluctance. The charge has force. The office maintains no register of closed files, on the ground that a closed file is a contradiction of the discipline, and the Provisional Grant 44-Sigma which funds most current survey work is renewed automatically.

Against this, the discipline's defenders observe that provisional entries have proven remarkably durable — several have outlasted the floors on which they were recorded — and that no provisional structure has ever been shown to have been unreal, only unresolved. A permit for field entry is required and is issued at the Arris; permits must be surrendered on exit, and visitors are asked to bring their own chalk.

Standard references remain the Treatise on Latent Architectonics, the Master Survey of Unrealized Architectonics (master copy on Floor 7,301), and the Census Field Manual: Provisional Addendum for population counts on floors whose occupancy is in doubt.