Department of Ephemeral Taxonomies

The Department of Ephemeral Taxonomies (DoET) is a permanent administrative body responsible for the classification, calibration, and provisional ordering of subjects deemed to possess inherent impermanence or ontological instability. Headquartered on Floor 14,302 (the "Mnemonic Labyrinth"), its primary mandate is the maintenance of master schemata for transient phenomena across The Tower. Its authority derives from DoIT-184 ("Directive on Interstitial Taxonomies"), though it operates under the provisional administration of Floor 440, the Gallery of Provisional Taxonomies.

Mandate and Jurisdiction

The DoET’s purview, as defined by Annex B of DoIT-184, encompasses "all taxonomical schemata applied to that which resists fixed placement, wherein the act of classification alters the classified." This includes, but is not limited to, the metrics for Oneiric Taxonomies, the fluid hierarchies within the Ephemeral Annex, and the calibration of decay rates for ephemeral minerals. The Department’s work is foundational to operations within the Bureau of Ephemeral Holdings and is frequently audited by the Office of Ephemeral Audits. Disputes regarding jurisdictional overlaps, particularly with the Department of Ephemeral Psychology, are settled by reference to the Register of Ephemeral Statutes.

Methodological Schools

Internal doctrine is divided between two primary schools of thought, a schism formally acknowledged in Concordance 44:17.

• Taxonomic Realism: The predominant school on Floor 14,302 holds that a taxonomy’s utility is its primary ontological claim. A classification is "real" insofar as it produces consistent bureaucratic outcomes. This school is responsible for the master calibration tables used across Floor 7,402 and in support of the Department of Ephemeral Cataloguing.
• Intrinsic Flux Theory: A minority, yet influential, school based largely on Floor 440 argues that impermanence itself must be the root taxonomic node. Proponents advocate for dynamic, self-negating classification trees where the highest-order category is "That Which Evades This Category." Their proposals are routinely filed with the Sub-Department of Ephemeral Completion for indefinite review.

Operational Units

The Department is organized into semi-autonomous Divisions, each handling a specific modality of ephemerality.

Division of Mnemonic Weights (DMW)

Calibrates the half-life of remembered but unrecorded concepts. Its standard unit, the lethe, measures the rate at which a filed memory ceases to be a reliable archival asset.

Division of Transient Hierarchies (DTH)

Author of the controversial Gradients of Ephemeral Precedence, a manual constantly amended to reflect which vanishing thing takes bureaucratic priority over another. The Department of Ephemeral Psychology uses a modified version of this scale.

Division of Ambiguous Placement (DAP)

Handles subjects that exist in multiple categories simultaneously. Its primary tool is the Schroeder Index, calculated quarterly, which determines the permissible number of cross-listed holdings before a subject is declared "integrally diffuse" and transferred to Integral Taxonomies.

The Curatorium of Verification

The DoET’s most visible external function is supplying one senior archivist to the Curatorium of Verification of the Department of Ephemeral Acoustics. This archivist is responsible for authenticating the taxonomic stability of sounds held within the Vault of Recalled Sounds, ensuring that a classified whisper, for instance, has not degraded into a sigh or a mere draft. The appointment, per a side-accord to DoIT-184, rotates every Fifth Chronology, though the current archivist has held the post for two chronologies due to a procedural ambiguity regarding the definition of "rotation" in an ephemeral context.

Notable Disputes and Holdings

The Department’s work is inherently contentious. Its filing system, known as the Labyrinthine Register, is itself an object of study, with some cartographers from Ephemeral Cartography arguing it constitutes a non-Euclidean annex. A persistent dispute, catalogued as Docket SP-4f7q22b (frequently conflated with Sentient Protest Docket 4f7q22b), concerns whether the Department’s own internal memos should be classified under its own ephemeral taxonomies, creating a potential recursive filing loop. The matter is perpetually tabled pending a ruling from the Gallery of Receding Perspectives, which has yet to be successfully convened.

The Department of Ephemeral Taxonomies remains the definitive authority on the ordering of the temporary, its own permanence secured by the very bureaucratic complexities its classifications are designed to manage.