From 9d8ef107673ef9268ddfdc3c390df63255eb8861 Mon Sep 17 00:00:00 2001 From: ocrampal Date: Mon, 6 Jul 2026 18:54:14 +0200 Subject: [PATCH] logic v5 --- ...06-logic-principles-of-the-expresion_v5.md | 298 +++++++++ ...0-logic-principles-of-the-expression_v4.md | 571 ++++++++++++++++++ 2 files changed, 869 insertions(+) create mode 100644 elements/neuron/appunti/2026-07-06-logic-principles-of-the-expresion_v5.md create mode 100644 elements/neuron/appunti/old/2026-06-30-logic-principles-of-the-expression_v4.md diff --git a/elements/neuron/appunti/2026-07-06-logic-principles-of-the-expresion_v5.md b/elements/neuron/appunti/2026-07-06-logic-principles-of-the-expresion_v5.md new file mode 100644 index 0000000..85be325 --- /dev/null +++ b/elements/neuron/appunti/2026-07-06-logic-principles-of-the-expresion_v5.md @@ -0,0 +1,298 @@ +# The Logic of the Tripartite Synapse Model — v5 + +*A synthesis of the principles the pseudocode enacts. This version is reorganized top-down: it +opens with the single principle everything specializes, then descends through six categories, each +presented as a facet of that principle rather than a separate idea. Where earlier versions built +bottom-up toward a conclusion, this one hands over the key first and shows each category turning it.* + +*What changed in v5. The old "evaluation" phase is retired — it was always preparation aimed at +the other scope. The ring is recut into three categories: ACTION, RECOVERY, PREPARATION. The +obsolete subject-mapping (lateral/local/vertical) is dropped. New findings are folded in: the +rhythm is (ACTION ⇄ RECOVERY) × many, then PREPARATION; every category spans all timescales; night +PREPARATION replays the day ACTION with the same machinery; build and release compete within a +component while material competes between components; there are two independent forgettings; and +collaboration by day versus competition by night follows from the rivalry of each scope's currency. +Nine categories are consolidated to six.* + +--- + +## The Unifying Principle + +Watch one presynaptic bouton for a day and a night. By day it releases neurotransmitter, restocks +its vesicles so it can release again, and — in the quiet after a burst — stocks a trace that records +how much this release mattered. By night it does the same three things at a slower tempo: it changes +its structure, restocks the material to change again, and replays the release as a probe to measure +whether the change is still warranted. Nothing supervises it. It reads only its own state and the +signals that reach it. What we call the synapse, the neuron, the memory, the organism is nowhere +inside the bouton — it is only the name we give to many such boutons, coupled. + +That is the whole model in one instance. Stated generally: + +> **There is only the local component and its one repeating act. Everything we call a system — the +> synapse, the neuron, the assembly, the organism — is that act, multiplied and coupled, and +> described from outside. The act has one shape (act, recover, prepare) run in two directions +> (outward by day, inward by night), and the relations between components are set by what is scarce. +> Holism is real, but it is enacted by the coupling, never encoded in any part.** + +Every category below is this principle, turned to face one question: *What is a component?* (locality), +*What is its act?* (the ring), *What are its two directions?* (the two turnings), *At what speeds does +it act?* (the ladder), *How do components relate?* (scarcity), and *Who is in charge?* (causation — +no one). None adds a new assumption; each specializes the one above. + +A note on language. This document does not say "the system." There is no system — only local +components, contextualized by their neighbors. Where the phrase appears, it is inside quotation +marks, naming the thing we are denying: an actor that stands above the parts, holds the whole, and +acts on it. No such actor exists here. + +--- + +## 1. Locality — The Only Thing That Exists Is a Local Component + +Everything the model contains is a local component: the bouton, the spine, the astrocytic process, +the dendrite, the soma, the axon. The actors we call higher — neuron, astrocyte, organism — are not +additional things. They are descriptions of many components' coupled activity, spoken from outside. +This is the direct reading of the unifying principle, and the rest of the category is its mechanics. + +**A component reads only its own state and the signals that arrive.** It cannot read another +component's interior, and it cannot read "the whole." When the bouton needs to know whether its +release reached a responsive target, it does not inspect the spine; it waits for a retrograde signal +the spine emitted. Coordination is never achieved by a component consulting a global state, because +there is no global state to consult. It is achieved by signals crossing between components, each +read locally and made to mean something by the local context that receives it. + +**Everything emits; nothing is a pure sink.** A component that only consumed would be invisible to +the rest and could not participate in coordination. Even the leaves of the daytime chain — the +bouton, the spine — emit: by day they emit fatigue upward and retrograde messages laterally; by +night they emit freed material into the shared pool and demand upward. To exist in the model is to +be readable, and to be readable is to emit. + +**Coupling is openness, and openness is bounded.** A component is open — it takes in signals and +supply, gives out signals and product — but its openness is bounded by what it can physically +reach: its own cleft, its own supply lines, the neighbors it is wired to. It is neither sealed (that +would make coordination impossible) nor unbounded (that would make it the whole). The bounded +openness is what lets many local components compose into something we can describe as a whole +without any of them being that whole. + +**Holism is real but only described.** The re-evoked pattern at night, the neuron's total activity, +the memory a synapse carries — these are real. But they are not stored anywhere. The pattern is not +in any component; it is what happens when many primed components ignite each other. The neuron's +"excitability" is not computed by anyone; it is the coincidence of many components' own lowered +thresholds. Holism is enacted by the coupling and read off by us as observers — it is never encoded +in a part, because if it were, that part would be the system, and there is no system. + +--- + +## 2. The Ring — One Act in Three Phases + +The local component's act has one shape, and it is the same shape everywhere: **ACTION, RECOVERY, +PREPARATION.** This is the specialization of the principle to the question *what is the act?* + +**The three phases.** +- **ACTION** is the component's defining deed — the thing that makes it the component it is. The + bouton releases; the soma fires; the spine responds; the axon and dendrite propagate. Action is + the only phase that spends irreversibly and reaches outside the component. +- **RECOVERY** is the fast alter-ego of action: it restores the capacity to act again. Vesicles + refill, sodium channels de-inactivate, calcium clears. Recovery undoes the local depletion the + action caused, so a next action is possible. It looks backward — it repairs what was just spent. +- **PREPARATION** shapes what comes next. It faces two futures at once: the next action in this same + scope, and the action of the *other* scope. Setting the release machinery for the next spike is + preparation for this scope; stocking the tag that the night will spend is preparation for the + other. Preparation is provisioning, not judging — which is why the old "evaluation" phase was a + misnomer and has been retired. Depositing a trace does not render a verdict; it lays down a + provision that a later phase may or may not draw on. What we once called evaluation was always + preparation aimed at the other scope. + +**The rhythm is (ACTION ⇄ RECOVERY) × many, then PREPARATION — then again.** The act is not one pass +through three phases. Action and recovery alternate rapidly — a tight inner loop, release-and-restock +many times over — and only when that alternation subsides does preparation run, punctuating the +bout and setting up the next. A spike train is exactly this: release ⇄ refill, release ⇄ refill, +then, in the sustained quiet, the preparation that stocks the tag and tunes the next train. The +inner loop is fast; preparation is the slower punctuation. + +**Every category spans all three timescales.** The three phases are not three speeds. Each phase is +a kind of work — deed, restore-capacity, provision — and each kind happens fast, medium, and slow. +Preparation especially is multi-timescale: it contains a fast loop (probe and restock), a medium +adjustment (tuning the release machinery from the tag), and a slow settling. A category names *what +kind* of work, never *how fast*. + +**Action is always local; recovery and preparation may be contextual.** A component necessarily has +its own action — the deed just is the local event occurring in it, and it cannot be performed on +another's behalf (that would be signalling, not acting). But the recovery and preparation of an +action can live in other components. A calcium channel's action is letting calcium in; its +evaluation-and-preparation live in the presynapse and above. So the ring is a property of *coupled +components*, not of the individual: **the ring must close — every action recovered from and prepared +for — but no single component need run all three phases itself.** What is necessary is the closing +of the ring, not its co-location. + +--- + +## 3. The Two Turnings — Day and Night + +The one ring is turned in two directions. This specializes the principle to *what are the +component's two scopes?* — and it is where the model's deepest duality lives. + +**Two contextualizations, two currencies.** By day the component faces outward, against the world +(the cleft); its currency is information — cheap, gathered passively, and non-rival (see category 5). +By night it faces inward, against the economy; its currency is material and energy — scarce, +conserved, and rival. The component does not know it is in "day" or "night" as a global state; each +turning simply runs against whatever environment is present, and the environment differs. + +**The rotation: the same physical event is a different phase in each scope.** This is the sharpest +form of the duality. Neurotransmitter release is the day's ACTION — the outward deed. The *same +release*, run at night, is PREPARATION: the component releases not to transmit but as a probe, to +replay a behavior and measure how much it participates in the re-evoked pattern. And the structural +change, which the day can only *mark* (the tag is an inert claim pointing at a restructuring that +never happens by day), is the night's ACTION — its irreversible defining deed. So the defining act +of one scope is the measuring-instrument of the other: release is day-action / night-preparation; +restructuring is night-action / day-inert-mark. The scopes do not merely run the ring in two +directions — they swap which event is the deed and which is the provisioning. Because it is a ring, +each scope simply enters at a different phase. + +**Night PREPARATION replays the day ACTION — the same machinery.** Because preparation-at-night is a +*replay* of the behavior, it runs the very code the day action runs: the same release, the same +capacity and vesicle checks, the same endurance deposit into the *same* trace. Endurance discovered +in replay is as real as endurance discovered in behaving. Only two things differ: there is no +dopamine (significance is already settled), and the released transmitter is a probe — it carries the +pattern onward to the next component and its own trace is read as participation. The action machinery +is written once and serves as the deed by day and the measurement by night. + +**The tag is the payload that crosses between the turnings; the fatigue loop is the switch.** Each +scope's PREPARATION mints what the other scope will consume. Day-preparation mints the tag — a +token of confirmed significance — which the night spends on structure. Night-preparation measures +participation, which gates that spending. The tag is one token with three roles: by day it is the +significance bridge; at night it lowers the component's own threshold so its pattern can re-ignite, +and it funds the build, a slice at a time. Distinct from this payload handoff is the *switch* — the +fatigue loop that decides *when* a component crosses between scopes. Activity accrues fatigue; a +single continuous integrator (the one actor that never sleeps) reads the aggregate fatigue and emits +a pressure; when a component's own activity falls and pressure is high, it crosses into night; when +pressure discharges, it crosses back. No scheduler; no clock. The switch says *when* to turn; the +tag says *what* crosses when it turns. One ring, two turnings, stitched by the tag and switched by +fatigue. + +**Two independent forgettings.** Because night ACTION is build ⇄ release (category 5), two distinct +things can be lost, by two distinct mechanisms. *Structural pruning* sheds built structure a +component no longer uses — driven by low participation, regardless of any tag it holds. *Intention +decay* is the tag itself decaying unspent — a planned strengthening that never found the +participation to license it. The tag is patient: it is sliced by building and never touched by +releasing, so it survives across non-participating cycles and cashes in when its pattern finally +re-evokes. Disuse prunes structure; unspent intention fades on its own slow clock. The two are +independent, and both are forgetting. + +--- + +## 4. The Timescale Ladder + +Orthogonal to the ring is the ladder of timescales. This specializes the principle to *at what +speeds does the component act?* The ring says *what kind* of work; the ladder says *how fast*; they +compose — every phase of the ring occurs at every rung of the ladder. + +**The rungs.** FAST (milliseconds to seconds): the immediate trace a single action leaves. MEDIUM +(seconds to minutes): occupancy and evidence — the running average of fast traces, and the +eligibility climbing toward a tag. SLOW (hours): the tag, the consolidation bridge. PERSISTENT +(written only at night): the structural ceilings, and the two conserved stocks — energy, which does +not return, and material, which does. + +**A tier's timescale is set by both its creation and its decay.** A fast trace is deposited as a +point event and relaxes in milliseconds. A medium trace ramps while a condition holds and settles +over minutes. The timescale is not a label attached to a variable; it is the joint consequence of +how the variable is written and how it fades. This is why the same climb appears in every component: +each action leaves a fast trace; the average of fast traces over seconds fills occupancy (short-term +strength); the average of that average over minutes, gated by dopamine, raises the tag. Occupancy is +the fast-and-medium memory of participation; the tag is its slow, validated distillate. + +**Evidence ascends the ladder; capacity descends it.** By day, information climbs from fast trace to +tag — evidence accumulating upward. By night, capacity is written downward from the tag into +persistent structure. Each rung also has its own failure meaning, set by its timescale: a fast pool +running dry is transient depression; a medium pool constrained is a standing endurance need; a +persistent ceiling reached is a structural limit. Depletion and recovery at each rung mirror the +creation and decay of its trace — the same timescale governs both the evidence and the capacity at +that level. + +--- + +## 5. Scarcity Decides — Collaboration by Day, Competition by Night + +How components relate to one another is not an independent fact; it follows from what is scarce. +This specializes the principle to *how do components relate?* — and it unifies conservation, +selection, and the collaboration/competition character of the two scopes into one causal chain. + +**Two conserved currencies, two rules of flow.** Energy ratchets: it is spent irreversibly, the +arrow of time in the model — a component that burns energy into structure cannot get it back. +Material circulates: it is freed by one component and reclaimed by another, conserved as it moves. +Scarcity of both forces choice — two ceilings (structure and endurance) compete for one finite +night pool, and what is not maintained drifts back down. + +**Rivalry of the currency sets the relation.** By day the currency is information, which is +*non-rival*: a bouton releasing glutamate does not use up the spine's ability to receive it; a trace +here does not deplete a trace there. When producing for others costs nothing, the natural relation +is **collaboration** — and the day is exactly that: each component acts so the next can act, releasing, +integrating, clearing, passing activity along the chain, co-producing the pattern and the tags. By +night the currency is material and energy, which are *rival and conserved*: every unit one component +builds into its structure is a unit another cannot have, and the total is capped. When what one takes +another loses, the natural relation is **competition** — and the night is exactly that: components +contend for the shared pool, build what they win, and free what they shed back into contention. + +**But night's competition is adjudicated by collaboration.** The relation is subtler than "day +collaborate, night compete." The replay that arbitrates the night's competition is itself a +collaborative act: a pattern re-evokes only if every component along its loop is primed and ignites +the next — mechanical coherence, a collaboration all the way around, one un-primed link breaking it. +Participation — the measure that gates who gets to build — *is* a measure of successful collaboration +in that re-enactment. So a component earns its share of the scarce material in proportion to how well +it collaborated in replaying the pattern. Collaboration is primary in both scopes: by day it +*produces* the shared, non-rival good; by night it *adjudicates* the competition for the rival one. +The register is economic, not martial — components do not fight; they contend for a conserved +resource, and the contention is settled fairly by a collaborative criterion. + +**Two competitions at two loci.** Within the night, competition appears twice, cleanly separated. +*Within* a component, build and release contend over its own structure, arbitrated by participation: +high participation builds (funded by the tag, a slice per cycle), low participation releases (freeing +material, the tag untouched), and in between the component holds. *Between* components, this one and +its peers contend for the shared material and energy during recovery. The internal tension (grow or +shrink?) is settled by the replayed pattern; the external tension (can I get material?) is settled by +contention with neighbors. Selection under scarcity is the sum of these: what survives a night has +both earned its tag by day and won its material by night, and what neither participates nor is +maintained returns to the pool. Selection is not a judge's verdict; it is what scarcity leaves +standing. + +--- + +## 6. Causation Circulates — Emergence Up, Constraint Down, Command Nowhere + +The final category specializes the principle to *who is in charge?* — and the answer is no one. +Causation moves in two directions across the coupling, and neither is command. + +**Emergence ascends; constraint descends.** By day, evidence and activity emerge upward: components +act locally, and their emitted activity is what a higher description (the neuron, the assembly) is +*made of*. Nothing reaches down to make them act. By night, constraint descends: a higher actor +broadcasts a bound — a renormalization target, a downscale factor — but it does not reach in. It +emits a signal; each component reads that signal and scales *itself*. The neuron never edits a +synapse; it announces a total, and the synapses each renormalize their own structure against it. + +**No actor authorizes its own restructuring.** A component cannot open its own night. It is *put in +position* by the actor above — which holds an aggregate the component cannot see and opens a window +the component cannot open — and then, within that window, the component acts locally on its own +state. The soma cannot decide within the soma which of its synapses matter; the synapses decide that +locally, by their own thresholds. And the synapses cannot ignite their pattern alone; the soma's +firing does that. Each is put in position by the other; neither reads the other's interior. This is +the recursive grant: act locally, be enabled hierarchically. + +**Command is nowhere.** There is no actor that both holds the whole and acts on it — that would be +the system, and there is no system. What looks like top-down control is always a broadcast constraint +scaled locally; what looks like bottom-up assembly is always local emission summed from outside. The +neuron that "renormalizes" only announces a number. The assembly that "replays" is only coincident +local thresholds propagating through coupling. Causation circulates — up as emergence, down as +constraint — but it never concentrates into command. This is the unifying principle in its final +form: because there is only the local component and its one act, there is no one to be in charge, and +the whole is enacted by the parts, never encoded above them. + +--- + +## Coda — The Six as One + +Read downward, the six categories are one principle refracted six ways. A component is local +(1); its act has one shape, the ring (2); the ring turns in two directions, day and night (3), at +every rung of the timescale ladder (4); the relations between components are set by what is scarce, +collaborative where the currency is free and competitive where it is conserved (5); and causation +circulates between components without ever concentrating into command (6). Remove any one and the +principle loses a facet; none stands apart from it. There is only the local component and its one +repeating act — and everything else is that act, multiplied, coupled, and described from outside. diff --git a/elements/neuron/appunti/old/2026-06-30-logic-principles-of-the-expression_v4.md b/elements/neuron/appunti/old/2026-06-30-logic-principles-of-the-expression_v4.md new file mode 100644 index 0000000..1ad1333 --- /dev/null +++ b/elements/neuron/appunti/old/2026-06-30-logic-principles-of-the-expression_v4.md @@ -0,0 +1,571 @@ +# Logic Principles of the Tripartite Synapse Model + +These are the principles that govern the model's logic — not the syntax in which it is +expressed, but the reasoning that shapes every variable, every behavior, every transition. + +A note on language. This document does not say "the system." There is no system — only local +components, each reading arrived signals and acting on its own state. "System," "whole," +"network," "the organism's memory" are names applied from outside, by us, describing what +coupled local components do together. The first principle states this; the rest honor it by +never speaking in the voice of a whole that does not exist. Where a sentence seems to want "the +system does X," it is rewritten as "local components, contextualized thus, do X locally" — +because the form of the document should enact its central claim, that locality goes all the way +down and all the way up, with no privileged vantage anywhere inside. + +The nine categories run foundation-first. The closing category — the Three-Phase Ring — is the +integrator: it shows how a single cycle of ACTION, EVALUATION, and PREPARATION, run locally by +every component and turned in two directions (outward by DAY, inward by NIGHT), is where all the +flows the earlier categories describe actually happen in time. It comes last because it uses +everything established before it. Its sharpest claim: a phase is a *role*, not a fixed event, so +the same physical machinery — a release, a structural change — serves as ACTION in one scope and +EVALUATION in the other, and the two scopes enter the ring at different phases. A vocabulary note +on motion: causation *circulates* across scales (category VI); the ring *turns* across phases +(category IX). Two different loops, two different words, kept distinct. + +--- + +## I. There Is No System; Holism Is Real but Only Described + +**There is no system — only local components.** Nowhere in the model is there a controller, a +global plan, a representation of the whole, or a vantage from which the whole is seen. There are +only components, each reading the signals that physically reached it and acting on its own state. +Every behavior is local; every evaluation uses only local state and arrived signals; every trace +is a local record; every commitment a local draw on a shared pool. "System" is our word for the +aggregate, spoken from outside. No component is the system, occupies its standpoint, or can read +it — not the smallest bouton and not the highest integrating actor. + +**And yet what we describe as holism is real.** Memory, rhythm, selection, consolidation, +sparsification — these are real behaviors, not illusions. The puzzle is that they are real +without any whole existing to bear them. The resolution: they are *enacted* by coupled locals, +never *encoded* in any one of them or in any representation. The holism is in the doing — the +ongoing competitive, signal-mediated, scope-alternating process of many local components — not +in any part and not in any model the parts contain. + +**What couples the locals is what we then describe as a whole.** Three couplings do all the work. +*Shared pools*: the only thing every component touches is the finite resource it competes for; +when one draws, the others have less, when one returns, the others have more — local actions +become mutually consequential through a common, capped resource. *Cross-scale coincidence*: a +lasting change requires confirmations from larger scales that no component can produce for itself, +so every lasting change records an agreement across scales that no single scale authored. +*Signals*: components cannot read each other, but they emit and receive, so they are coupled +without any one gaining access to another's interior. Through these three, purely local action +acquires what we describe — from outside — as global organization. + +**The properties we call holistic belong to no component.** Rhythm, equilibrium, memory, the +joint selection for significance-and-sustainability — none exists in any single component. They +are descriptions of the coupled population over the DAY/NIGHT alternation. The gap between "what +a component knows" (only its own state) and "what we describe the population as doing" (choosing +what to keep) is not bridged by any component knowing more. It is bridged by the coupling itself. +Understanding, here, is enacted, not encoded — and "the system understanding" is only ever our +shorthand for coupled locals enacting, faithfully local at every step, holistic only in our +description. + +**Even the cycle is local.** Each component runs its own three-phase ring (category IX), its +phase boundaries set by its own trace decays, not by any shared clock. There is no global cycle +any more than a global controller — only many local rings, loosely coupled through shared pools +and signals, which we describe together as "the rhythm." The turning is real in each component; +the collective rhythm is our description of many local turnings. + +--- + +## II. Two Contextualizations, and the Loop Between Them + +**DAY and NIGHT are not two phases of a system; they are two contextualizations of the same +local components.** A component does one kind of thing always: it reads arrived signals and acts +on local state. What changes between DAY and NIGHT is the *context* that fixes what those signals +mean, who the component's counterparties are, and what is scarce. By "DAY" we name the +contextualization in which the relevant environment is the external world and the component's +information is about exogenous events. By "NIGHT" we name the contextualization in which the +relevant environment is the internal economy and the information is about endogenous +resource-state. The component cannot tell which it is in — it has no access to "the scope" any +more than to "the system." It reads local signals, and context makes them mean what they mean. + +**Each contextualization has its own environment and its own information.** NIGHT is not the +absence of an environment — it is interaction redirected from the world to the self. By day a +component interfaces outward, perceiving sensory-driven events and reward; by night it interfaces +inward, perceiving how much resource reached it, what its peers are claiming, what coheres. Both +are full perceive-act loops against a real environment. Resource levels and demand-signals are +the night's perceptual field exactly as glutamate and dopamine are the day's. "Internal" and +"external" are relative to the subject one fixes; from a component's own standpoint there is only +"my environment" — the signals reaching me — which happens to be the world by day and the economy +by night. + +**A component is thus two contextualizations sharing one structure.** By day it is an +environmental interface; by night an economic agent. The two share only the structure, and the +structure is exactly what carries between them: the night-agent builds the ceiling the day- +interface will operate within, and the day-interface generates the evidence (the tag) that +authorizes the night-agent to build. The tag is information becoming a resource-claim at the +boundary — the single unit that crosses from the day's information-context to the night's +resource-context. + +**The move between the two is an emergent local transition, not an imposed clock.** There is no +global day/night switch. Each component enters its NIGHT when its own activity is low and an +arrived sleep-pressure signal is high, and returns to its DAY when that signal falls. Both +conditions are read locally — own activity, arrived signal — so the transition is itself a local +decision. Components therefore cross over at different times: a wave, not a switch (local sleep). +The signal that carries them is itself the product of locals: activity generates fatigue; fatigue, +integrated by one component (the hypothalamic actor) that does nothing but integrate fatigue and +emit pressure, raises sleep-pressure; high pressure plus a component's own quiet opens its +restructuring window; restructuring discharges fatigue; discharge lowers pressure; the component +re-enters DAY. DAY and NIGHT are the two phases of one homeostatic loop the local components run +on themselves — neither imposed from outside nor scheduled from above. The component never knows +it is "in NIGHT"; it reads a signal level and its own activity, and what results we call night. + +**The mechanistic root of the alternation: behavior and restructuring exclude each other.** A +component cannot rebuild its structure while it is busy behaving — the two compete for the same +substrate. Only when its activity is low does it have the access to its own architecture that +restructuring requires. The brief low-activity gaps within a day permit small adjustments; the +sustained, widespread quiet that the sleep-pressure signal creates permits the large ones. NIGHT +is not an arbitrary time for consolidation — it is the condition under which consolidation is +*possible*, because quiet is what grants a component access to itself. + +**Two distinct couplings join the scopes — do not conflate them.** The scopes are connected in +two independent ways. The *fatigue loop* is the **switch**: it controls *when* a component crosses +between DAY and NIGHT (activity → fatigue → sleep-pressure → transition), a purely temporal +control carrying no content. The *evaluation handoff* is the **payload**: it passes *what* each +scope leaves for the other (the tag minted by day's evaluation, consolidated by night; the +structure minted by night's evaluation, read by the next day — see category IX). One says when to +switch; the other says what crosses. A reader who merges them loses the fact that a component +could switch scopes with nothing to hand off (a quiet day leaves no tag) or hold a rich payload +that waits several switches to be honored (a tag consolidated over several nights). Switch and +payload are orthogonal. + +--- + +## III. Locality and Signals + +**Only local evaluation.** Every decision a component makes — to act, to deposit a trace, to +register an interrupted success — uses only information physically present in it. It cannot read +another component's interior. The presynapse does not know the postsynapse's calcium; the +dendrite does not know which distal spines are active; the astrosynapse does not know whether the +postsynapse is waiting. Each judges from its own state alone. + +**A component cannot read the whole, either.** The completion of locality: not only can no +component read another's interior, none can read "the system," "the scope," or the global state. +There is no aggregate vantage available anywhere inside — not even to the integrating actors, who +read only the summed emissions that reached them and emit signals in turn, with no more access to +the whole than a bouton has. Locality holds up the hierarchy as strictly as across it. + +**Cross-component influence travels only as signals that arrive and become local.** Information +crosses a boundary only by being emitted — feedforward transmission, retrograde messengers, +neuromodulatory and sleep-pressure broadcast, the demand and recycled resource of the night +economy. A signal in transit is invisible; a signal that has arrived is local and can be read. +Downstream reaches upstream by emitting; upstream never reaches into downstream. Every coupling +in the model is of this form — an emission that becomes, on arrival, another component's local +state. + +**Everything emits; nothing is a pure sink.** No component only consumes. Each, whatever it +receives, emits something a neighbor will read — its transmitter, its retrograde feedback, its +fatigue, its demand, its recycled material, or simply its activity for an integrating actor to +sum. The direction of emission reverses with context (see the two Logic panels): outward and +downstream by day, inward and upstream by night. But the invariant holds in both — there are no +leaves and no sinks, only a reversal of which way "out" points. + +--- + +## IV. Resource and Conservation + +**Nothing is free.** Every behavior consumes a resource. There is no operation that does not draw +something down. This is not a constraint added on top of the logic — it is its foundation. +Selectivity, competition, and forgetting all follow from the single fact that resources are +finite. + +**Resources are redistributed, not created.** The pools are bounded by external ceilings. Within +them, resource is only moved — from one site to another, from a dismantled structure back to the +pool. No internal process manufactures capacity; it only reallocates. A gain anywhere is paid for +by a loss elsewhere — coupling that is not designed but is the automatic consequence of drawing +from a common pool. + +**Two resources, two conservation laws.** Energy is a flow — produced and consumed, gone after +use. Material is a stock — incorporated into structure and recovered when structure is dismantled. +Different sources, different recovery. A behavior can be energetically affordable yet materially +limited, or the reverse. Keeping them distinct is what makes the accounting honest. + +**Material circulates; energy ratchets — energy is the one irreversible flow.** This is the sharp +form of the distinction, and it is the arrow of time. Material cycles indefinitely: spent into a +ceiling, recovered when that ceiling decays, returned to be spent again. Energy does not. It is +produced fresh at the roots, burned irreversibly on the work of building and behaving, never +recovered. Everything else cycles or relaxes — traces decay and reform, occupancy fills and +drains, material recycles — but energy only ever goes down per unit produced, capped externally by +glucose. The total learning the local components can ever do is bounded by their lifetime energy +throughput, and no internal cleverness lifts that bound. The irreversibility of energy is what +makes them age. + +**Every economy has a single capped root.** Each resource traces to one producer with a hard +ceiling — the astrocyte cell body for synaptic energy, the soma for neuronal material. Everything +downstream competes for shares of that capped production. The ceiling is set from outside and is +the ultimate arbiter of how much can be done. + +**Scarcity is what forces choice, and choosing is learning.** What is consolidated is the outcome +of bounded demand (the standing tags and endurance needs) meeting bounded supply (the energy and +material produced each night), and the match need not clear — a night may run out of energy before +it runs out of demand. Unmet demand is not discarded but carried forward and retried. The +selective pressure is, at bottom, this repeated failure of supply to fully meet demand: it is +*because* not everything can be afforded that there must be choosing, and the choosing is the +learning. + +--- + +## V. The Timescale Ladder + +The spine. Every quantity sits on one of four nested tiers, and timescale is not incidental to it +— timescale *is* its meaning. + +**Four tiers.** FAST traces (ms–s): residual calcium, synaptic current — the immediate response. +MEDIUM occupancy and evidence (s–min): the filled receptor surface and channel coupling, the +accumulating possible-tag, the endurance need. The SLOW tag (hours): the validated bridge to +consolidation. PERSISTENT capacity (written only at night, drifting over days): the structure and +budget ceilings. A quantity's decay constant is what it means — a fast-decaying quantity is a +momentary signal, a slow one a commitment, a non-decaying one a capacity. Putting two timescales +in one variable destroys both meanings, which is why a quantity carrying both a momentary and a +lasting role is split into two. + +**Capacity and occupancy are two rungs, not a separate principle.** What was once stated as +"night builds containers, day fills them" is simply this: the PERSISTENT tier is written at night +and bounds the MEDIUM tier, which fills by day within it. The same physical quantity — receptor +count, vesicle coupling, fuel level — has a fast/medium component (how full, occupancy) and a +persistent component (how big, capacity), governed by different processes at different tiers. +Short-term change is occupancy; long-term change is capacity; they never do each other's job. + +**Two capacities, two drives, one pool.** Structure is the capacity for strength — how powerfully +a behavior can act. Budget capacity is the capacity for endurance — how long it can be sustained. +Both are persistent ceilings, both filled competitively at the medium tier, both drawn from the +same finite material and energy, so strength and endurance compete. A ceiling of either kind is +never free even by day: filling it costs a competitive share of a shared pool, and a high ceiling +makes a large standing claim satisfiable only by out-competing neighbors. Capacity that cannot be +filled is wasted. + +**Structure shapes form, not just maximum.** A ceiling does not merely cap — it conditions the +transfer function at every moment. Tighter calcium-channel coupling makes each spike more reliably +coupled to release; more anchoring slots convert each pulse more faithfully to current; tonic +co-agonist keeps the gate primed. The persistent tier shapes the quality of behavior continuously, +not only its peak. + +**The tiers are a ladder: each rung's output is the next rung's input, in both directions.** +*Evidence ascends* — fast traces accumulate into medium evidence, which bridges (on validated +coincidence) into the slow tag, which commits at night into persistent capacity; nothing reaches +a slower tier without accumulating through the faster ones. *Capacity descends* — persistent +structure bounds medium occupancy, which bounds fast behavior; the ceiling at each level was set +by the level above, on a slower timescale. Both the strength pathway (trace → possible-tag → tag +→ structure) and the endurance pathway (trace → endurance-need → budget ceiling) are the same +upward climb, differing only in what validates it: associative dopamine for strength, homeostatic +fuel-shortfall for endurance. + +**A pool's recovery timescale is what its exhaustion means.** The ladder governs pools as well as +traces. A *fast* pool (the readily-releasable vesicle pool) depletes and recovers fast, so its +shortfall is transient — short-term depression, self-correcting once activity slows. A *medium* +pool (operational budget) recovers at the medium scale, so its shortfall is a standing constraint +worth recording as endurance evidence. *Persistent* capacity changes only at night, so its +"shortfall" is a structural limit unfixable in the day. This is why a behavior's failure mode can +be read off which pool ran dry: fast-pool exhaustion is depression, medium-pool exhaustion is +endurance evidence, persistent limit is structural. Depletion-and-recovery is the pool-side mirror +of creation-and-decay — drawn down by behaving, refilled toward a ceiling — and in both, the +timescale is the meaning. + +**The ladder is structure; the ring is timing; they are orthogonal and they compose.** The ladder +(this category) is about *tiers of persistence* — which quantities last how long, and how capacity +descends while evidence ascends. The three-phase ring (category IX) is about *phases of a cycle* — +when a component acts, evaluates, and prepares. These are independent axes: one could have the +ladder without a cyclic ring (a pure feedforward hierarchy) or a ring without four tiers (a cycle +at one timescale). They compose in a specific way: the ring's phases are *where the ladder's flows +occur*. ACTION injects at the bottom of the ladder (deposits the fast trace). EVALUATION enacts +the up-flow (works the fast trace into medium evidence and the slow tag). PREPARATION enacts the +down-flow (reads the descended capacity as the readiness the next action runs within). So the two +pictures are not two names for one thing — the ladder says what persists, the ring says when each +persistence-flow happens, and evaluation-is-up / preparation-is-down is where they meet. + +--- + +## VI. Causation Circulates — Emergence Up, Constraint Down, Command Nowhere + +The model has causation in two directions, and the whole point is that they coexist without +either becoming control. + +**Emergence flows up.** What we describe as global organization — sparsification, normalization, +winner-take-more, the allocation of fuel — is nowhere computed centrally. It emerges from many +local components drawing on shared pools. No allocator decides which synapses to fuel; the +synapses' own demands, each purely local, competing for capped production, produce the allocation. +No allocator exists; the allocation is real. The local emissions sum, through the pool, into an +aggregate no component authored. + +**Constraint flows down.** An integrating actor holds an aggregate its constituents cannot see — +total weight, territory demand, accumulated fatigue — and broadcasts it back as a constraint each +constituent then interprets locally. The neuron, summing emitted activity it never reads interiors +to obtain, broadcasts a renormalization that each component applies to itself. This is top-down, +but it is constraint, not command: the higher actor sets a bound; the lower still decides locally +within it. + +**Command exists nowhere.** This is the load-bearing claim. The downward direction never becomes a +higher component deciding for a lower one, nor a lower one deciding for itself in isolation. No +actor authorizes its own restructuring — each is put in the position to restructure by the actor +above it, which holds the aggregate it cannot see and opens the quiet window it cannot open, then +*broadcasts*, never reaching in. The soma cannot decide within the soma; it is put in position by +the neuron — which is itself put in position by the integrated fatigue, which is itself the sum of +what the components emitted. Causation circulates — up as emergence, down as constraint — and the +circle closes with no controller anywhere on it. Every integrating actor is itself only another +local component reading summed arrived signals; none is "the system" in disguise. + +**The recursive grant repeats at every scale.** The relationship is the same all the way up: the +astrosynapse is put in position by the astrocyte; the soma, bouton, spine, branch, axon by the +neuron; the neuron and astrocyte by the hypothalamic fatigue signal; the synaptic strengthening by +the organism's dopamine and the assembly's replay. Each scale grants its constituents the +conditions they cannot grant themselves — an aggregate they cannot see, a window they cannot open — +and grants it by signal, never by reaching in. The hierarchy is real, the circulation is closed, +and at no point does it produce a seer of the whole or a commander of the parts. + +**This cross-scale circulation enters each component's ring at a definite phase.** Causation +*circulates* across scales (this category); a component's ring *turns* across phases (category IX) — +two different loops. They meet at a definite point: the downward constraint arrives at the +component's PREPARATION phase, whose subject is precisely "what is handed down from above," and the +upward emergence departs as what the component emits during ACTION and commits during EVALUATION, +which sums into the aggregate the scale above will read. So the vertical arm of the cross-scale +circulation is lived, inside each component, as the vertical phase of its ring. The three subjects +of the ring (beside / self / above) are the three ways a component connects to everything else, and +each of the other categories' flows plugs into the phase whose subject matches it. + +--- + +## VII. Selection and Asymmetry + +**Building is the active drive; weakening is its shadow.** All the machinery is oriented toward +strengthening what is significant and sustaining what is fuel-limited. There is no symmetric +machinery for weakening. Weakening happens to whatever the building machinery did not select, as a +consequence of the resources building consumed. The orientation is toward learning; forgetting is +its cost. + +**Depression is never explicit — it is what happens when building does not.** No signal says +"weaken this." Ceilings of both kinds decay continuously and are held up only by maintenance; when +building consumes the shared resource, unmaintained ceilings drift down. Depression is the absence +of maintenance, not the presence of a depression signal — and the same is true of lost endurance, +idle capacity removed for lack of use, and of occupancy, which drifts back the moment its driving +trace decays. In ring terms (category IX), this decay lives in the PREPARATION phase: weakening is +what preparation's settling does to whatever evaluation did not supply enough to maintain. There is +no weakening phase because weakening is un-honored decay inside the preparing phase. + +**Validation enters from beyond the part; the part cannot validate itself.** A component cannot +know whether its own activity was significant — that information exists only at a larger scale and +arrives as a signal (the neuromodulatory broadcast for the organism's verdict, replay for the +assembly's). Cheap reversible change is autonomous; expensive lasting change requires authorization +that enters from outside the component being changed. This is why lasting change always records a +coincidence across scales: each scale confirms what the one below cannot know about itself. + +**Strength is associative; endurance is homeostatic.** Strength requires significance — the +dopamine coincidence saying "this was worth saving." Endurance requires only that fuel, not +structure or significance, was the binding constraint on a forming success — it needs no external +validation, because metabolic sustainability is not the organism's to judge but the component's own +to register. Two independent criteria, and selection requires winning on both: activity without +significance is not saved; significance without sustainable fuel cannot be maintained. The +conjunction filters for connections both valuable and viable. + +**Equilibrium is the residual of imperfection.** Where alignment or balance is reached, the success +removes the very signal that drove it, allowing slow drift back, which regenerates the signal. The +soma that aligns to its input rhythm stops generating the mismatch that aligned it, drifts, and +re-aligns. The component that builds enough endurance stops depleting, loses the signal, and lets +capacity decay until depletion returns. Each component hovers near its own optimum, never resting +there, corrected continuously by the small errors its own imperfect state produces. What we +describe as a stable population is the sum of these local never-quite-settlings. + +--- + +## VIII. Coupling, Openness, and Boundedness + +**Couplings create trajectories, not just states.** Some variables, once moved, make further +movement the same way easier — the astrosynapse wrapping tighter after potentiation, easing future +potentiation. These self-reinforcing couplings give momentum: components do not merely occupy +states, they follow trajectories, deepening whatever direction they have begun. The astrosynapse is +the strongest such coupling — the gain control that reshapes the input itself, amplifying whatever +trajectory a synapse is on. + +**The same signal serves opposite functions through different receivers.** Glutamate spillover +brakes the presynapse while exciting the astrosynapse — one ligand, two receptor types, opposite +cascades, simultaneous opposite effects. Function is set by the receiver, not the signal. One event +coordinates several responses with no coordinating mechanism. + +**Metabolic availability is a selective pressure parallel to validation.** Beyond the explicit +activity-and-reward gating, the bare availability of fuel continuously selects which components can +participate: one that cannot be fueled cannot generate the activity that would let it be tagged. +Metabolism silently shapes what can be learned, independent of and parallel to the plasticity +machinery. + +**Finite and open, not infinite and closed.** The components are bounded and their state space is +bounded, and they receive inputs they cannot generate from within — sensory drive, neuromodulatory +and replay validation, metabolic supply. Because they are finite, their self-modification generates +no infinite regress. Because they are open, their highest validation comes from outside any +component being changed. + +**The fixed points are explicit, not hidden.** The quantities the components cannot modify from +within — thresholds, the vascular ceiling, the neuromodulatory and replay signals — are declared as +given. They are the boundary with what the components did not set and cannot inspect. Making them +explicit is the honest acknowledgment that every self-modifying process operates within constraints +it did not choose. Correctness is never certified internally: whether a change was good is answered +by the organism's later experience in the world, fed back as signal. The fixed point lies outside — +the components act, the world responds, and the response, not any internal check, determines what +was worth keeping. + +--- + +## IX. The Three-Phase Ring, and Its Two Turnings + +This is the integrator. Everything above describes *what* flows — resource, evidence, constraint, +signals, capacity. This category describes *when*: the single cycle each local component turns, +and how the earlier categories' flows distribute across its phases. One ring, run locally by every +component, turned in two directions — outward by DAY, inward by NIGHT. + +**The ring has three phases, given by the three relationships a component stands in.** A component +relates to exactly three things — its peers beside it, itself, and what is above it — and the ring +is one turn through all three: + +- **ACTION** (subject: peers, *lateral*). The defining interaction with the component's + counterparties. It is punctate — an event — and it deposits a fast trace, the residue the rest of + the turn will read. +- **EVALUATION** (subject: self, *local*, handing to the other scope). In the quiet after the + action, the component reads the fast trace and works it up the ladder into slower evidence. It + never acts; its product is an inert token minted for the *other* scope. +- **PREPARATION** (subject: what is above, *vertical*, readying the next action in this scope). As + the trace decays, the component settles its pools and gates forward, reads what has descended, and + assembles the readiness the next action will run on. Preparation is the sole gateway to action. + +The order around the ring is ACTION → EVALUATION → PREPARATION → ACTION. Because it is a ring, no +phase is first; each turn's preparation feeds the next turn's action, and each turn's evaluation +reads the action that preceded it. A phase is a *role*, not a fixed physical event: the same +physical machinery (a release, a structural change) can serve as different phases in different +scopes, and each scope enters the ring at a different phase — the rotation is worked out in "The +two turnings" below. + +**The ring is necessary; its co-location in one component is not.** What the logic guarantees is +that the ring *closes* — that every action is evaluated and every action is prepared for — not that +any single component runs all three phases itself. A component necessarily has ACTION: the local +act it performs is what makes it a component at all. But the EVALUATION and PREPARATION of that act +may live in *other* components. Take the calcium channel as a component: its ACTION is letting Ca²⁺ +in — that is its whole local act. It does not evaluate whether the influx mattered (the presynapse +does, reading the resulting trace) nor prepare its own next opening (its coupling readiness is set +by presynaptic short-term potentiation, and above that by neuronal provisioning). The channel is +almost pure action; its evaluation and preparation sit in the components around and above it. Yet +the ring is intact — the influx is acted, evaluated, and prepared for — merely spread across three +components rather than turned within one. So the ring is a property of *coupled components*, not of +the individual: a component contributes its action, its neighbors and superiors contribute the +evaluation and preparation that action requires, and together they close a ring none of them runs +alone. This is the same frame as category I — there is no ring-bearing "self," only local +components whose coupled actions we describe as one closing ring. + +**Action is always local; evaluation and preparation may be local or contextual.** This is the +axis beneath the previous point. A phase is *local* when the acting component supplies it itself, +*contextual* when a surrounding or higher component supplies it. Evaluation and preparation come in +both forms: the presynapse evaluates its own release and prepares its own next release (local), +while the calcium channel's influx is evaluated by the presynapse and prepared by neuronal +provisioning (contextual). Action admits no such split — it is always local, and necessarily so. +A component can hold an aggregate and evaluate a neighbor's trace on its behalf, or provision a +neighbor's readiness; but it cannot *act on a neighbor's behalf*, because the action simply is the +local event occurring in that component. To perform another's action would mean it was never that +component's action to begin with. Acting-for-another is not action but signalling. So the one phase +that can never be contextual is action, and this falls directly out of what action is — which is +why every component necessarily has its own action, while its evaluation and preparation may be +scattered into its context. + +**The phases are event-delimited and decay-timed, never clocked.** A phase has no fixed duration. +The action is the boundary where preparation ends and behaving begins; the fast trace's decay below +threshold is roughly where evaluation ends and preparation resumes. The quiet interval between +actions — a component's refractory-like period, whether literal refractoriness at the soma or the +NOT-active steps at the bouton — is where evaluation and preparation live, and its length is set by +the firing pattern. A fast train compresses preparation to nothing (no time to refill: depression); +sparse action gives preparation its full extent. Timing here is chemistry, not a timer (category V). + +**Evaluation and preparation share the fast trace but send it two ways.** The same trace the action +deposits is read by both: evaluation reads it for *significance* (climbing toward the tag, for the +other scope), preparation reads it for *readiness* (tuning the next action's timing and thresholds, +in this scope). The soma makes this visible — its nuclear-calcium climbs toward the tag +(evaluation), while its inactivation, adaptation, and alignment traces tune the next spike +(preparation) — all from the one spike's deposit. Evaluation looks up and across scopes; preparation +looks around the ring to the next action. + +**Evaluation reaches the next action only through preparation.** Evaluation never acts; it lays down +inert evidence. For that evidence to shape a future action it must pass through preparation, on one +of two timescales. Within a scope: evaluation's medium products (possible-tag, endurance-need) +become preparation's inputs, folded into near-term readiness. Across scopes: evaluation's slow +product (the tag) waits, is consolidated into structure, and structure is read by the next scope's +preparation. Either way — evaluation proposes, preparation disposes, action runs. The one-way ring +is what separates gathering from acting by exactly the time it takes preparation (or the night) to +honor what evaluation proposed; that separation is where deliberation lives. + +**The coincidences of the action sort by timescale.** Where a component detects the coincidences +that authorize a lasting change depends on whether they must be instantaneous. Coincidences that +must be simultaneous are detected *in ACTION* by the receptors themselves — the postsynaptic NMDA +gate passing large calcium only when presynaptic glutamate, astrocytic co-agonist, and local +depolarization align, amplified by the descended back-propagating spike. Coincidences that can be +integrated over the quiet are detected *in EVALUATION* by trace accumulation — the organism's +dopamine gating the tag over the following interval. Same logic (require several partners to align), +sorted into the phase whose timescale it fits: instantaneous coincidence is action, integrable +coincidence is evaluation. + +### The two turnings + +One ring, turned in two directions. The three phases and their subjects are invariant across DAY +and NIGHT; what rotates is the *content* flowing through them (information by day, resource by +night) and — the sharp point — *which physical event counts as which phase*. From a component's +own standpoint there is no "open" or "closed" scope: each turning runs against *its* environment, +the world by day and the economy by night. + +**The same physical event is ACTION in one scope and EVALUATION in the other.** This is the +deepest form of the duality. Transmitter release is the day's ACTION — the defining outward deed, +transmitting to the world — and the fast trace is its byproduct, later evaluated. But the *same +release*, run at night, is EVALUATION: the component releases not to transmit but as a *probe*, to +read its own fast trace as a measure of how much it participates in the re-evoked pattern. And the +structural change, which the day can only *mark* (the tag is an inert claim pointing at a +restructuring that never happens by day), is the night's ACTION — its defining, irreversible deed. +So the defining act of each scope is the assessment-instrument of the other: release is +day-action / night-evaluation; restructuring is night-action / day-inert-mark. The scopes do not +merely run the ring in two directions — they swap which event is the deed and which is the +measurement. Because it is a ring, each scope simply enters at a different phase: the day enters at +ACTION (act, then evaluate, then prepare — it must act first, the world will not wait); the night +enters at PREPARATION (prepare, then measure, then act — it can afford to look before it leaps). + +**DAY — the ring turned outward.** PREPARATION reads the descended structure and refills the pools; +ACTION is the cleft exchange (release, integrate, clear) against the world, leaving the fast trace; +EVALUATION climbs the ladder to the tag — significance worked up, minted for the night. Currency: +information, cheap, gathered passively. Ladder direction: evidence ascending. Token minted: the +**tag**. + +**NIGHT — the ring turned inward, as a sequence of replay cycles.** PREPARATION imports material +and energy and *primes* the component's own spontaneous threshold from its own standing tag (a high +tag lowers the threshold, raising occupancy). ACTION is the structural change — general homeostatic +lowering, then rebuilding where the tag still stands and participation was confirmed, consuming the +tag on the build. EVALUATION is the probe: the component spontaneously releases/fires and reads its +fast trace as *participation* in the re-evoked pattern — no dopamine, because significance is +already settled; this measures only circuit centrality. Currency: resource, scarce. Ladder +direction: capacity descending. Token minted: the **structure**. + +**Replay is how the undifferentiated tag is spent on specific behaviors — and it needs no +orchestrator.** A component's tag accumulates by day from *many* behaviors into a single +magnitude — how much change it needs, stripped of what for. It cannot spend that lump correctly in +one commit (that would build a blend serving no behavior). Replay re-presents the day's behaviors +one at a time so the lump can be allocated to each. The mechanism is local and emergent: at night, +freed from external drive, components spontaneously fire; where a tag has lowered a component's +threshold, intrinsic fluctuation ignites it, and the activation propagates through the *same +pathways used by day*, re-evoking the pattern — but only where *every* link is primed (each +component's own tag lowered its own threshold), so a pattern carries only if it was significant all +the way around. This coherence is mechanical, not checked: an un-primed link breaks the loop at the +gap. The re-evoked components run their *structural* logic, not their significance logic — they are +not re-asking "did this matter" (settled) but "how much do I change for this." The replaying +assembly is not an actor; it is the coincidence of many components' own lowered thresholds +propagating through recurrent coupling — holism enacted, not encoded (category I). + +**Why night cycles: the tag depletes, and depletion re-sorts the queue.** Each re-evocation lets +the participating components allocate a *slice* of their tag to that behavior and consume it — which +raises their thresholds back, so that pattern steps aside and the *next*-deepest tag surfaces on the +next cycle. The night sweeps its repertoire in rough order of tag depth, strongest most often, each +pattern depleting and yielding to the next, exactly as a vesicle pool depletes and refills to +schedule release one scale down. This is why the tag is spent incrementally across cycles rather +than all at once, why strong memories replay repeatedly, and why consolidation is a gentle settling +over many cycles (and many nights) rather than a single commit. The night ends when the tag is +exhausted (well-rested — every significant pattern replayed and its structure rebuilt) or the +night's energy is spent (overloaded — unspent tags carry forward). A pattern that never re-evokes +before its tag decays is simply never built — which is how the turning forgets. + +**The two turnings are stitched by evaluation, and the fatigue loop switches between them.** Each +scope's EVALUATION mints the token the *other* scope will consume: day-evaluation mints the tag +that night spends; night-evaluation (participation) gates the structure that the next day operates +within. This *payload* handoff is distinct from the *switch* — the fatigue loop (category II) that +decides *when* a component crosses between scopes. One says what crosses; the other says when to +cross; they are orthogonal (category II). So the DAY/NIGHT alternation is one ring, entered at two +different phases, handing off to itself through evaluation, switched by fatigue — not two separate +machines.