The Doctrine of Mitigated Glare (Case 9001-δ)

The Doctrine of Mitigated Glare is the body of practice, arising from Case 9001-δ, governing the lawful reduction of reflected or emitted light where full intensity would render a surface, a page, or a party to a proceeding unreadable. It is distinguished from outright extinction of light — a procedure forbidden outside the sealed chambers of Floor 940 — and from the general law of Palliative, which concerns the maintenance of artefacts in acceptable dysfunction. The Doctrine holds that glare is not a defect to be removed but a condition to be administered, and that every administration of it must be recorded at the moment of mitigation rather than reconstructed afterward.

Origins: the complaint of Clerk Ovin Sarr

Case 9001-δ was entered in the winter of the eleventh recension by Ovin Sarr, a junior clerk of the Scriptorium of Held Pages, who for nine days had been unable to complete a routine transcription on account of a westward-facing reading bay whose ceiling transmitted the afternoon sun with what Sarr described as "a violence of whiteness." Sarr's petition did not ask that the bay be darkened. It asked that the bay be made admissible: that the light be reduced only to the point at which the page could be read, and no further, so that the record of what had been lost might itself survive.

The Bureau of Static Metrics was directed to measure the bay. Its surveyors produced a figure of 71 units on the scale then in use, three units above the threshold at which letterforms were found to bleed into their neighbours. The Bureau's instrument of record, the Ocular of Measured Glare, was brought down from its Floor 1180 annex and employed under the supervision of two Clerks of the Unblinking Eye. Their certificate was admitted without objection and has never been reopened, although the bay in question was rebuilt in the fourteenth recension and now faces east.

The rulings

Three findings emerged from the case and are cited jointly as the Doctrine. The first establishes that mitigation must be incremental: no surface may be dimmed by more than one unit of glare at a time, and each increment must be witnessed. The second establishes that the mitigated state is the state of record; where a page cannot be read at full glare, it is the full-glare reading that is struck from the registry, not the mitigated one. The third, and most litigated, provides that a party suffering mitigated glare may not later claim to have read the original.

"Let the light be diminished by degrees, and let each degree be witnessed by two, and let the last degree be named the reading, and let all former degrees be named the glare."

— Ninth Concordance, Annex 12, cl. 4

The doctrine was applied almost immediately to the viewing aperture at the western end of Floor 102: The Hall of Receding Perspectives, whose light is drawn from the Court of Mitigated Vanishing between the hours of eight and four. Because the aperture's illumination arrives already softened by its passage, the Court's clerks argued successfully that the aperture was in a state of natural mitigation and required no further administration. The Office of Received Light has disputed this reading for sixty years, on the grounds that natural mitigation is a contradiction in terms and that a phenomenon cannot administer itself.

Relationship to the Doctrine of Vacant Designations

Sarr's successors extended the Doctrine of Mitigated Glare to names, reasoning that a designation too bright to be looked at directly is a glare no less than a ceiling. This borrowing was resisted by the Bureau of Registry, whose Doctrine of Vacant Designations already governed the retirement of over-illuminated names, and which objected that two doctrines cannot both claim the same darkness. The dispute was settled by the precedent of Luminary Elara, in which a name of exceptional brightness was found to have been vacated not by the glare doctrine but by the vacancy doctrine, and the glare doctrine was held to apply only to the light around a name and never to the name itself. Semantic Drift in the affected registers was subsequently measured by the Office of Semantic Integrity and found to be within tolerance.

Criticism and the split in the Concordances

The principal scholarly disagreement concerns whether mitigated glare is a property of the object or of the observer. The Ninth Concordance holds the former: glare inheres in the surface, and mitigation alters the surface's standing in the registry. The Fourteenth Concordance, drafted after the Case of the Receding Reference Desk, holds the latter: glare is a relation between a reader and a page, and the doctrine therefore regulates readers, not surfaces. The two have never been reconciled. The Court of Mitigated Vanishing has declined to choose between them, noting in a frequently quoted marginalium that "a court which must decide by which of two lights it cannot see is under no obligation to see."

Practical difficulties persist. Echoic Integrity, established in the Case of the Receding Reference, requires that a mitigated reading reproduce faithfully when cited; but a reading taken at reduced glare frequently does not reproduce at all. The Stairwell of Qualified Intent was for two recensions the sole approved route between a mitigated bay and its registry, on the reasoning that a reading carried up an ordinary stair arrives altered. A proposal to extend the same requirement to the Ambulatory Reading Room was refused under the Doctrine of Small Standing.

Procedure and register

Administration of the Doctrine is recorded in the Register of Diminished Light, kept in the eastern annex of the Atrium of Measured Breath and bound in a dark cloth chosen, according to its first keeper, "so that the register itself shall not add to the problem." Entries are made in the following order, and an entry out of order is void:

• the full-glare measurement, in units, with the instrument named;
• the name and standing of the witnessing clerks;
• each increment of reduction, separately numbered;
• the mitigated reading, entered in the hand of the party who made it;
• the hour, which is to be given in full and not by approximation.

A reduction may not be made on a floor where the Standard Candle is kept, nor in any chamber within sight of it. In the winter of the sixteenth recension a clerk of the Scriptorium, one Meret Holl, dimmed a bay by four units in a single movement in order to finish before the bell, and the resulting entry was struck; Holl's subsequent petition that the Doctrine be amended to permit "mitigation in the interest of the hour" was refused, and Holl is remembered chiefly for the marginal note appended to the refusal, which reads in its entirety: "The hour is not a party to this case."

The Doctrine has never been applied to the Ocular of Measured Glare itself, which is held to be the instrument by which glare is known and therefore incapable of suffering it.