Ficool

Chapter 2 - The Etiquette of Equivalence

The Outside of Counting did not so much exist as refuse to apologize for not needing to.

There was no air, there was adjacency. The climate, if one insists on provincial words, was governed by units and counits, by the slow respiration of adjunctions uncoiling between provinces called Being and Saying. Objects did not live here; contexts did. A terminal silence ⊤ received every gaze with a generosity unbecoming of theology, and an initial hush ⊥ offered to begin anything that would permit beginning to remain unfulfilled. Between those two courtesies, he stood: the man formerly named by a letter, naked the way a forgetful functor is naked—structure removed without shame, essence left to argue for itself.

Two attendants approached without footsteps and with the implacable innocence of symbols carved into wet stone. One bore the sigil η, the other ε, unit and counit, those preludes to marriage that do not blush when marriage is between categories.

"Put this on," said η, offering a robe woven from free constructions, each thread an unwarranted generator, each knot a relation postponed. It rustled like syntax. "It will protect you from having to explain yourself."

"Take this off," murmured ε, already removing the robe he had not yet donned, exposing again the theorem of his epidermis. "It will protect you from believing that you have explained anything."

"I am uninterested in protection," he said, and the remark creased the horizon the way a natural transformation creases intent into method.

In the Outside, equality had been demoted to a provincial superstition. Identities were no longer crisp and juridical; they were paths, witnessed obligations traced in the ambient medium. A self was a labyrinth of loops based at a point that could not be pointed to without altering the loop. He reached toward his own shoulder and felt not flesh but a corridor in which all arguments against his existence had been sheathed for lack of an honest adversary. The fundamental groupoid of the man performed a courteous bow to the notion that contradiction can be picturesque without being instructive.

"Do not look for equals," advised a breeze that was plainly a professor, "look for equivalences."

He walked though locomotion here was tantamount to varying the probe. Whenever he moved, it was by testing himself against small, well-behaved acts of attention. He learned the theorem that deserves to be inscribed on every lintel: what you are is the pattern of what you do to everything that can notice you. Yoneda, in her unbecomingly radiant pinafore, was everywhere without being anywhere; she waved at him from the corner of an eye he did not own.

Presheaves fell like considerate snow, covering conjecture with fine-meshed courtesy. A covering family introduced itself, asked if it might be permitted to glue. He consented, and for a moment he wore a garment consisting of local trivializations, fragile patches of modesty that could be respected by any parochial observer. But when he searched for a global section, the Outside smiled the way a cathedral smiles when reminded that the sky cannot be archived. He remained globally nude and locally dressed, which, as fashions go, is indistinguishable from sanctity.

The docents from the Grand Set, those who had not deserted into the smug comprehensibility of the countable, watched by means of a right adjoint traditionally labeled Γ, taking global points where there were none to be had. They filed reports that were, in their defense, flawless in the internal logic of a topos that had absolutely no obligation to respect their expectations. Each report ended with the confession that truth here did not come in yeses and nos but in opens: neighborhoods of assertion one could enter without having to marry certainty.

He passed beneath a frieze of subobject classifiers, Ω itself, lapping like a sea at the ankles of propositions too stiff to swim. Truth ceased to be a Boolean tantrum; it became a locale, distributed like benevolence. The Law of Excluded Middle sent a dignified note of regret and retired to a monastery whose rules it wrote for itself. Choice had already been dismissed back in the basilica of sets; here, it was not even scandalous to ignore it. What scandal could endure among sheaves, when every scandal is merely a failure to glue?

At the limit of modest imagination, the topos shed its mortal skin and rose into an ∞-topos, where even equivalence was only the first draft of a more delicate courtesy. Between anything and anything else lay not a judgment but a ladder of reconciliations: 1-paths, 2-paths, 3-paths, a hymn of higher homotopies humming through the bone. He turned his head and felt his identity type dilate, becoming not a verdict but a weather system. Univalence presented itself not as a law but as an oath: to treat sameness and equivalence as one sacrament. He took the oath because there was no honest alternative.

"Name yourself," requested a voice that sounded like it had invented vowels to impress someone.

"Names are left adjoints," he said. "I prefer right."

This was not disdain. It was economy. Naming throws a net and calls the catch a conquest; recognizing retrieves without injury. The Outside took the remark with good humor, for it loved any sentence in which a verb performs more work than a noun.

He crossed into a plaza named CAT with a caution bordering on tenderness. All categories, small, large, and the sort of illicit meta-categories outlawed by the hygienic, sat around a fountain that refused to be well-defined at any size. Size issues attempted to introduce themselves. He bowed and did not ask for their papers. The Grothendieck universes circled overhead like planets on sabbatical, each one a polite lie told for the sake of calculation. He offered them the respect due to lies that pay their debts.

"Are you done ascending?" asked η, her hands now full of units for adjunctions nobody would dare consummate. Her tone suggested domestic concern, which is the tenderest form of metaphysics.

"I have mislaid height," he answered. "All that remains is resolution."

"Of what?" pressed ε, already erasing the question so it would not count against anyone.

"Of the quarrel between being and saying."

He showed them the quarrel held between his fingers like a luminous fish that had elected to be caught. It had two faces: on one, phenomenon; on the other, theorem. They were not enemies. They had been arranged back-to-back by a childhood misunderstanding. He brought them forehead to forehead. An adjunction sighed. Somewhere in the atrium of the Grand Set, a docent woke from a nap and swore to be kinder to paradox.

Monads gathered at his feet like patient dogs. One of them, call it T, had the intelligent eyes of a confession: Saying after Being after Saying. He stroked it without condescension. Another, call it G, a comonad, circled him with the serene insistence of context: what a thing brings with it when it arrives. He allowed G to place a collar of counits around his throat. It looked, to the faint of heart, like a priestly yoke. It was, in truth, a license not to pretend to be alone.

He deposed equality within himself and enthroned equivalence. The ceremony was bloodless, as all real revolutions are. Courts empty when the law stops mistaking hats for heads. He discovered, with the resigned joy of those who outgrow certainty without resenting their youth, that contradiction, when seen across the right span, was merely the shadow cast by a poor choice of resolution. To change the span was to redeem the crime.

At intervals, a rumor of the world he had left blew through him. It smelled of ledgers and mortality. He did not despise it. The Grand Set had been a generous parent: it had given him numbers to suffer by and proofs to die in. Every exile owes a letter home. He dispatched one by adjoint courier. It read without ornament, which is the most scandalous ornament. Stop counting. Start relating.

The child with the robe appeared as a global element that had somehow wandered in from a topos that permitted such things. She held out the garment again, less as an offer than as a hypothesis.

"You can wear it," she said, "on Tuesdays. Locally."

"That would require a calendar," he replied, and the Outside produced, with polite reluctance, a sheaf of time that assigned to each open of occasion a partially ordered mercy. Tuesday existed in exactly the way a saint does: only when invoked with the appropriate courtesy. He put the robe on in three neighborhoods and took it off in two, creating along their overlaps a cocycle of discretion that a less patient eternity might have found comic.

"You look ridiculous," she judged, smiling the way a theorem smiles after it has committed a harmless prank.

"Ridiculousness," he said, "is a natural transformation from dignity to grace."

They walked together to the brink of a region where presheaves forget to apologize for not being sheaves. There, a sieve pinned to no particular arrow drifted down and attached itself to the child's shoulder like a brooch. It matched her eyes. She did not thank him, which is how thanks are best delivered.

Beyond the brink, language waited in its most dangerous attire: not rhetoric, not grammar, type. Words here did not denote; they inhabited. Sentences were rooms with their doors left open in case someone better than certainty walked in. He paused, because even a man who has discarded height must attend to thresholds I will not insult by calling liminal.

"Will you go further?" η asked, because it is polite to give people the chance to be brave in public.

"I will go inward," he corrected, because it is kinder.

He set his foot upon a floor that was also an introduction rule. Somewhere far away, which is to say in a place that still counts, bells rang for a wedding that had agreed never to demand witnesses. The Outside folded around him with the efficiency of a well-written lemma. At his back, adjunctions finished one another's sentences; ahead, a cough that might have been univalence clearing its throat to speak plainly at last.

He entered Measureless Syntax the way a promise enters a life: by making the life the kind of place a promise could have been waiting for all along.

Consider this not an ascent, then, but a change of etiquette. Where he goes next, every proof says "please," every phenomenon says "thank you," and truth, at last, uses the informal pronoun.

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