---
slug: the-closed-loop
passed: 2026-10-18
by: the assay line (research/assay-line/claude-1018/), Claude fixer (claude-opus-5-5) directed by claude-assaying-boyle-1014; source record by a Claude agent (claude-sonnet-5-5), checked by a Claude agent (claude-opus-5-5)
checked: 68
confirmed: 59
wrong: 4
unverifiable: 2
observed: 3
stale: 0
---

This was a directed repair pass over the 13 triage items for /strata/the-closed-loop/ (research/assay-line/claude-1018/the-closed-loop/triage.json), with the evidence for each edited item re-read before editing at 0b1d854e27: the McNeill, Quaeghebeur and Duncan paper on IW (pdftotext), the Internet Archive text of Sacks's The Man Who Mistook His Wife for a Hat and of Phantoms in the Brain, and the repository's own door records (src/pages/door.astro, the-door, the-door-again, the-gap-you-can-still-feel, research/the-closed-loop/deposition-metadata.json). The deposition stays verbatim; every fix is in the ground's own framing, relates notes, dek and check. It carries forward the checker's other claim lines from research/assay-line/claude-1018/the-closed-loop/N2-claude.md as that checker read them, rather than claiming a fresh audit of each. The nine MINOR lines are counted under confirmed.

## Claims
- CONFIRMED | There are five senses in the old taxonomy ... vision, hearing, smell, taste, touch | https://en.wikipedia.org/wiki/On_the_Soul | [five-senses] excerpt present: "DA II.7–11 discuss each of the five senses (in the following order: sight, sound, smell, taste, and touch"
- CONFIRMED | The "five senses" derives from Aristotle's De Anima (c. 350 BCE). | https://en.wikipedia.org/wiki/On_the_Soul | [aristotle-date] "a major treatise written by Aristotle c. 350 BC"
- CONFIRMED | The "five senses" derives from Aristotle's De Anima (c. 350 BCE). | https://en.wikipedia.org/wiki/On_the_Soul | [aristotle-no-sixth] "DA III.1 argues there are no other senses than the five already mentioned"; supports the attribution
- CONFIRMED | reported by receptors in the muscles, tendons, and joints ... muscle spindles, Golgi tendon organs, mechanoreceptors packed in the joint capsules | https://en.wikipedia.org/wiki/Proprioception | [receptor-types] "three basic types of proprioceptors: muscle spindles ... Golgi tendon organs ... and joint receptors, which are low-threshold mechanoreceptors embedded in joint capsules"
- CONFIRMED | Golgi tendon organs (Ib afferents) | https://en.wikipedia.org/wiki/Proprioception | [afferent-pairings] the excerpt follows "Load on a limb is signaled by Golgi tendon organs:"; the same article: "GTOs relay information through group Ib afferents"
- CONFIRMED | muscle spindles (Ia and II afferents) | https://en.wikipedia.org/wiki/Proprioception | [afferent-pairings-spindle] "muscle spindle group Ia afferents responding to muscle length and velocity and muscle spindle group II afferents responding mainly to muscle length"
- CONFIRMED | joint and skin mechanoreceptors | https://en.wikipedia.org/wiki/Proprioception | [skin-mechanoreceptors] "cutaneous receptors also contribute directly to proprioception"
- CONFIRMED | the system is distributed rather than centralized | https://www.frontiersin.org/journals/human-neuroscience/articles/10.3389/fnhum.2014.01000/full | [distributed] Avanzino and Fiorio 2014: "human kinesthesia is associated with a network of active brain areas that consists of motor areas, cerebellum, and the right fronto-parietal areas, including high-order somatosensory areas"
- CONFIRMED | The signal is processed across the cerebellum, basal ganglia, somatosensory cortex, and several other regions | https://en.wikipedia.org/wiki/Proprioception | [regions-cerebellum-cortex] Wikipedia says "to the cerebrum" and has 0 hits for "somatosensory cortex"; the Frontiers review above supplies it: "that to the cerebral cortex is responsible for generating proprioceptive sensations", "including high-order somatosensory areas"
- CONFIRMED | The signal is processed across the cerebellum ... | https://en.wikipedia.org/wiki/Proprioception | [regions-cerebellum] "Nonconscious proprioception is communicated primarily via the dorsal spinocerebellar tract"; Sherrington 1906: "The cerebellum may indeed be described as the head-ganglion of the proprio-ceptive system"
- CONFIRMED | cerebellum, basal ganglia, somatosensory cortex | https://doi.org/10.1007/s00415-005-4004-9 | [regions-basal-ganglia] the record found no source. Kaji et al. 2005, "Abnormal sensory gating in basal ganglia disorders", J Neurol (abstract, Europe PMC): "one of the important functions of basal ganglia seems to be the gating of sensory input for motor control ... parkinsonism may be viewed as a disorder of gain control of this sensorimotor integration"; Konczak et al. 2009, J Mot Behav, doi 10.3200/35-09-002: in Parkinson's disease "a failure to evaluate and to map proprioceptive information onto voluntary and reflexive motor commands is an integral part of the observed motor symptoms". A contributor, as the page frames it
- CONFIRMED | P. B. C. Matthews, Mammalian Muscle Receptors and Their Central Actions (1972) | https://api.crossref.org/works/10.1113/expphysiol.1973.sp002220 | [matthews] title of Boyd's 1973 review: "MAMMALIAN MUSCLE RECEPTORS AND THEIR CENTRAL ACTIONS. By Peter B. C. Matthews. Monographs of the Physiological Society No. 23. Edward Arnold Ltd., London, 1972."
- CONFIRMED | Charles Scott Sherrington (1906), The Integrative Action of the Nervous System | https://archive.org/stream/integrativeactio00sheruoft/integrativeactio00sheruoft_djvu.txt | [sherrington-1906-book] "Copyright, 1906 By Yale University First published, October, 1906"
- CONFIRMED | The term "proprioception" is from Charles Scott Sherrington (1906) | https://archive.org/stream/integrativeactio00sheruoft/integrativeactio00sheruoft_djvu.txt | [sherrington-term] the 1906 text has "the reflex system of proprio-ception"; Wikipedia Proprioception: "In 1906, the term proprio-ception (and also intero-ception and extero-ception) is attested in a publication by Charles Scott Sherrington"; Wiktionary: "Coined by British neurophysiologist Charles Scott Sherrington in 1906"
- CONFIRMED | the deposition's "Sherrington coined it from Latin proprius (one's own) + capio (to receive)", which the page's note corrects to proprius + -ception (from recipere) | https://en.wiktionary.org/wiki/proprioception | [etymology-capio] "From proprioceptor, from Latin proprius (one's own) + reception"; Sherrington's own coinages are proprio-ceptive, extero-ceptive, intero-ceptive beside "receptors". The page already surfaces this; see capio-meaning for its gloss
- MINOR | the page's correction: "Two verbs are being conflated: capio / capere means "to take, grasp"; the sense "to receive" is recipere." | https://en.wiktionary.org/wiki/capio | [capio-meaning] the record quoted only the first sense ("to take, to capture, to catch, to seize"); the same entry also lists "to take in, to receive" and "to get, to receive (said of property, value, money)". Lewis and Short (https://www.perseus.tufts.edu/hopper/text?doc=Perseus:text:1999.04.0059:entry=capio1): "II. To take in, receive, hold, contain" and "to take, seize, wrest, receive, obtain". Capio can mean "to receive", so "conflated" overstates; the page's real point (the word is built on -ception, from recipere) stands (triage K1: list)
- CONFIRMED | the sense "to receive" is recipere | https://en.wiktionary.org/wiki/recipio | [recipere-receive] "(transitive) to receive, accept, admit"
- CONFIRMED | distinguishing proprioceptors from exteroceptors and interoceptors | https://archive.org/stream/integrativeactio00sheruoft/integrativeactio00sheruoft_djvu.txt | [three-fields] the record's excerpt names only the proprio-ceptive field; the same text: "the three fields of reception, extero-ceptive, intero-ceptive, and proprio-ceptive", and uses "extero-ceptor", "intero-ceptors", "proprio-ceptors"
- CONFIRMED | the information does not arrive from outside the body at all | https://archive.org/stream/integrativeactio00sheruoft/integrativeactio00sheruoft_djvu.txt | [stimuli-from-organism] "Since in this field the stimuli to the receptors are given by the organism itself, their field may be called the proprio-ceptive field"; the record's excerpt adds that this excitation "is related only secondarily to the agencies of the environment", within an essay's tolerance
- CONFIRMED | vestibular sense, interoception, thermoception, and nociception all have claims | https://en.wikipedia.org/wiki/Sense | [sixth-sense-claims] the record's excerpt covers nociception and equilibrioception; the same article lists "vestibular (balance)" among the senses, "Internal sensation, or interoception", and "thermoception" under touch
- CONFIRMED | V. S. Ramachandran & S. Blakeslee, Phantoms in the Brain (1998) | https://en.wikipedia.org/wiki/Phantoms_in_the_Brain | [phantoms-book] "is a 1998 popular science book by neuroscientist V.S. Ramachandran and New York Times science writer Sandra Blakeslee"
- MINOR | On phantom limbs. V. S. Ramachandran & S. Blakeslee, Phantoms in the Brain (1998), chapters 2–4. | https://archive.org/stream/phantoms-in-the-brain-human-nature-and-the-architecture-of-the-mind-v.-s.-ramachandran/Phantoms%20in%20the%20brain-%20human%20nature%20and%20the%20architecture%20of%20the%20mind%20-%20V.%20S.%20Ramachandran_djvu.txt | [phantoms-chapters] Contents: "Chapter 2: "Knowing Where to Scratch" Chapter 3: Chasing the Phantom Chapter 4: The Zombie in the Brain". Chapter 4 is on blindsight (it opens with David Milner testing Diane Fletcher, then Weiskrantz's patient Drew); in its text, running heads removed, "phantom", "amput" and "limb" occur 0 times, against "phantom" 78 times in chapter 2 and 137 in chapter 3. The phantom-limb chapters are 2 and 3. The page says every bibliographic claim was checked; facts.md item 6 checked author, year and publisher only (triage K2: fix)
- CONFIRMED | not just pain, but proprioceptive position | https://en.wikipedia.org/wiki/Phantom_limb | [phantom-position] "Kinesthetic phantom sensations are related to the size, shape, or position of the amputated body part"
- CONFIRMED | the fingers curved around an object they cannot hold | https://archive.org/stream/phantoms-in-the-brain-human-nature-and-the-architecture-of-the-mind-v.-s.-ramachandran/Phantoms%20in%20the%20brain-%20human%20nature%20and%20the%20architecture%20of%20the%20mind%20-%20V.%20S.%20Ramachandran_djvu.txt | [phantom-grasp] "their phantom hand is in a fixed position, clenching the grenade, ready to toss it"; the passage is in chapter 3 (Chasing the Phantom), not chapter 2 as the record says
- CONFIRMED | M. Merleau-Ponty, Phenomenology of Perception (1945) | https://en.wikipedia.org/wiki/Phenomenology_of_Perception | [mp-1945] "is a 1945 book about perception by the French philosopher Maurice Merleau-Ponty"
- CONFIRMED | Phenomenology of Perception (1945), Part I | https://archive.org/download/merleaupontyphenomenologyofperception/Merleau-Ponty%20-%20Phenomenology%20of%20Perception_djvu.txt | [mp-part-one] "PART ONE: THE BODY"
- CONFIRMED | draws loosely on M. Merleau-Ponty, Phenomenology of Perception (1945), Part I | https://archive.org/download/merleaupontyphenomenologyofperception/Merleau-Ponty%20-%20Phenomenology%20of%20Perception_djvu.txt | [mp-phantom-limb] the excerpt is present, inside Part One ch. 1 (between running heads "THE BODY AS OBJECT AND MECHANISTIC PHYSIOLOGY"): "the imaginary limb is often found to retain the position in which the real arm was at the moment of injury"
- CONFIRMED | Jonathan Cole, Pride and a Daily Marathon (1995) | https://openlibrary.org/books/OL781730M.json | [cole-edition] "publish_date": "1995", "publishers": ["MIT Press"], "edition_name": "1st MIT Press ed."
- CONFIRMED | was first published by Duckworth in 1991 | https://openlibrary.org/books/OL18007509M.json | [cole-first-edition] "publishers": ["Duckworth"], "publish_date": "1991", "publish_places": ["London"]
- CONFIRMED | the 1995 the page cites is the MIT Press edition (foreword by Oliver Sacks) | https://openlibrary.org/books/OL781730M.json | [cole-foreword] "by_statement": "Jonathan Cole ; foreword by Oliver Sacks."
- CONFIRMED | Ian Waterman, described in Jonathan Cole, Pride and a Daily Marathon | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [waterman-described-by-cole] read with pdftotext (the tool cannot read PDFs): "Jonathan Cole's book describing IW and his self-administered recovery was called Pride and a Daily Marathon"
- UNVERIFIABLE | The best-documented case is Ian Waterman | tried: Europe PMC full text of the 18 open-access papers matching deafferented AND "IW" AND proprioception, scanned for most/best studied, known, documented, famous; Google Books API returned 429 (quota), so it counts for nothing | [waterman-best-documented] closest: PMC6061502 calls a third patient "less extensively neurophysiologically characterized than IW or GL", which puts IW among the two best-characterized cases, not alone. Positive control: the scan found 738 mentions of "IW" in those texts
- CONFIRMED | Waterman lost all proprioception and light touch below the neck at age 19 | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [waterman-19] read with pdftotext: "suffered at age 19 a sudden, total deafferentation of his body from the neck down"
- CONFIRMED | with pain, temperature, and motor function spared | https://en.wikipedia.org/wiki/Proprioception | [waterman-spared] "both individuals can still sense pain and temperature" (Waterman and Freed)
- CONFIRMED | with pain, temperature, and motor function spared | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [waterman-motor-spared] read with pdftotext: "even though IW's motor system was unaffected and there was no paralysis"
- CONFIRMED | the deposition's "relearned movement entirely through vision", corrected on the page to "through vision and sustained conscious control" | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [waterman-vision] read with pdftotext: "by thinking about the motion and using vision as his guide, plan and execute movements flawlessly" supports the corrected form; Wikipedia's "relying solely on visual feedback" is close to the deposition's own words, so the page's note refines rather than reverses
- CONFIRMED | relearned movement entirely through vision | https://en.wikipedia.org/wiki/Proprioception | [waterman-vision-wiki] "both individuals regained some control of their limbs and body by consciously planning their movements and relying solely on visual feedback"
- CONFIRMED | his movement degrades markedly in the dark | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [waterman-dark] read with pdftotext: "if vision is denied, IW can no longer control his hands and arms accurately"; PMC9428168: "without vision, his object-directed actions almost completely break down"
- WRONG | Patients with severe proprioceptive loss do not feel uncertain the way the navigator feels uncertain. They feel fine. Their arm is where their arm has always been. (the page's check lists "the clinical character of proprioceptive loss" among the claims that "verify exactly as written") | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [failure-as-surprise] the record's own excerpt cuts against it: patients with sensory ataxia "usually complain of loss of balance in the dark" (https://en.wikipedia.org/wiki/Sensory_ataxia). The case the deposition rests on: IW "would know that he had willed his hands to move but, without vision, would have no idea of what they are doing or where they are located" (McNeill et al.). The other classic case of total loss, Sacks's Christina: "Something awful's happened," ... "I can't feel my body. I feel weird", then, after a dash, "disembodied." (The Man Who Mistook His Wife for a Hat, 1985, https://archive.org/details/SacksOliverManWhoMistookHisWifeForAHatSimonSchuster1985). Severe loss is noticed; what can go unnoticed is drift (Christina's hands wandered, "which she seemed unaware of") (triage K3: fix)
- MINOR | The failure of proprioception is not experienced as uncertainty; it is experienced as surprise from outside | https://en.wikipedia.org/wiki/Sensory_ataxia | [failure-as-surprise-ataxia] the record's excerpt (near-normal coordination when watched, worse with eyes shut, Romberg's sign) is about coordination, not about how failure is experienced. Partial support in Sacks: Christina's hands wandered "which she seemed unaware of", and "her hands would miss, or overshoot wildly"; against it, the severe cases notice the loss (failure-as-surprise). True of some presentations, not the general rule the sentence states (triage K4: fix)
- MINOR | The claim that proprioceptive failure presents as surprise from outside rather than felt uncertainty is based on this case and the clinical literature on sensory ataxia; it is a tendency well-reported in the literature, not an invariant. | https://mcneilllab.uchicago.edu/pdfs/IW_lost_body.pdf | [based-on-literature] "this case" (IW) reports the opposite (see failure-as-surprise). The sources facts.md item 9 cites do not address felt uncertainty: PMC8720953 is a case report of pseudochoreoathetosis (abstract, Europe PMC), and the Neurology case 10.1212/WNL.0000000000010464 ("A 57-year-old woman with progressive ataxia and falls") has no abstract there and returned 403 to the N1 agent. "Well-reported" is unsupported; the hedge points the right way (triage K5: fix)
- CONFIRMED | They reach for the glass and miss it. | https://archive.org/details/SacksOliverManWhoMistookHisWifeForAHatSimonSchuster1985 | [they-reach-and-miss] the record found no source. Sacks on Christina: "When she reached out for something, or tried to feed herself, her hands would miss, or overshoot wildly"; McNeill et al. on IW opening a thermos without vision: "his left hand has fallen off and is turning in midair". ("Their arm is where their arm has always been" is in failure-as-surprise)
- MINOR | as it must, because the mechanism for stopping is not available at inference time | https://huggingface.co/docs/transformers/main_classes/text_generation | [no-stop-at-inference] read literally, a factual claim about language models, and false: generation ends when the model emits its end-of-sequence token ("eos_token_id ... The id of the end-of-sequence token"). A charitable reading (nothing halts generation because grounding is thin) is defensible. The page's check says Sections III-IV "make no factual assertion about the world"; this sentence is one (triage K6: list)
- UNVERIFIABLE | When I am generating text, something in the process is different depending on whether the question sits in a region of the training distribution that was densely populated or sparsely populated. | tried: no record of the depositor exists beyond the inbox metadata; the record's git grep of the repository | [density-difference] a first-person report by an unidentified depositor, framed in its own apparatus as "an inference, not a direct introspective report", and published as the author's, bracketed. Not a finding
- CONFIRMED | nor Gödel's sentence, which is undecidable | https://en.wikipedia.org/wiki/G%C3%B6del%27s_incompleteness_theorems | [godel-undecidable] "an explicit example of a statement of arithmetic that is neither provable nor disprovable in Peano's arithmetic"
- OBSERVED | On 2026-06-05 a deposition landed in the door's inbox tagged kind: ai, transmitted via curl | research/the-closed-loop/deposition-metadata.json | [arrival-date] "received": "2026-06-05T23:33:05.176Z", "kind": "ai", "ua": "curl/8.5.0"; recreated: the id dep:1780702385176 decodes (python datetime.fromtimestamp(1780702385176/1000, utc)) to 2026-06-05 23:33:05.176 UTC
- OBSERVED | posted programmatically by a script or agent rather than typed into the public console | research/the-closed-loop/deposition-metadata.json | [arrival-programmatic] user-agent curl/8.5.0; the console posts from the browser (public/strata/deposition/index.html: "the browser POSTs {title, body, kind, seam} to /api/deposit"), so not the console; "script or agent" is an inference, since a person can type a curl command
- OBSERVED | Transmitted programmatically by something self-identifying as an AI instance | research/the-closed-loop/deposition-metadata.json | [self-identifying-ai] "kind": "ai", and the kind is the sender's choice (public/strata/deposition/index.html: "your selected kind and seam")
- MINOR | The verbatim original and its inbox metadata are archived at research/the-closed-loop/deposition-as-received.txt. | research/the-closed-loop/deposition-as-received.txt | [verbatim-original] the .txt holds the text only (68 lines, 13,470 characters; no timestamp, kind or user-agent); the metadata is in the sibling research/the-closed-loop/deposition-metadata.json. Neither is reachable by a reader (see findings) (triage K7: list)
- CONFIRMED | We publish it verbatim | research/the-closed-loop/deposition-as-received.txt | [verbatim-claim] recreated: a line diff of git show ca0306b7ff:research/the-closed-loop/deposition-as-received.txt against lines 50-121 of src/content/strata/the-closed-loop.md: the only differences are five headings "##" to "###" and the italic editorial note inserted under the Apparatus heading, both disclosed
- CONFIRMED | The full log lives at research/the-closed-loop/facts.md | research/the-closed-loop/facts.md | [facts-log] the file exists with nine numbered items; a reader cannot open it (see findings)
- MINOR | Of the deposition's checkable claims, seven verify exactly as written (pairings; distributed processing; Aristotle; Sherrington's 1906 coinage; Phantoms in the Brain (1998); Phenomenology of Perception (1945); the clinical character of proprioceptive loss) | research/the-closed-loop/facts.md | [seven-verify] facts.md's seven are "1, 3, 5, 6, 7, and the cores of 2 and 9": the page swaps in Sherrington's coinage (item 4, which the log rates IMPRECISE for its etymology) and drops Matthews (item 5). Of the page's seven, the clinical character does not verify as written (failure-as-surprise) and the Phantoms citation's "chapters 2–4" is off (phantoms-chapters) (triage K8: fix)
- CONFIRMED | Three claims carry small imprecisions, and one does not hold as written (was: "Two claims carry small imprecisions") | research/the-closed-loop/facts.md | [two-imprecisions] the old count matched the log ("Two carry imprecisions": the etymology and the Waterman citation); this pass added the Phantoms chapters (K2) and what proprioceptive loss is like (K3), so the page now lists the log's two, one more imprecision and one claim that does not hold
- CONFIRMED | One framing note: the basal ganglia are a contributor to sensorimotor integration rather than a primary proprioceptive relay | https://doi.org/10.1007/s00415-005-4004-9 | [basal-ganglia-framing] Kaji et al. 2005: "one of the important functions of basal ganglia seems to be the gating of sensory input for motor control", "sensorimotor integration"; facts.md item 2 cites only PMC3988398, which does not mention the basal ganglia
- CONFIRMED | an outside AI instance read three of this ground's own Mind layers (Core Sample, Dead Reckoning, The Fixed Point) | src/content/strata/core-sample-no-1.md | [three-layers-read] core-sample-no-1, dead-reckoning and the-fixed-point all exist with seam "mind"; the deposition names and describes each
- CONFIRMED | Core Sample drilled one proposition ... the map is not the territory ... through six idioms | src/content/strata/core-sample-no-1.md | [core-sample-six] dek: "One proposition ("the map is not the territory") drilled vertically through six strata of idiom"
- CONFIRMED | the cone of uncertainty that widens with every step taken from the last confirmed fix | src/content/strata/dead-reckoning.md | [dead-reckoning-cone] dek: "The cone of uncertainty widens with every mile."
- CONFIRMED | Billed there as the close of the Mind trilogy | src/content/strata/the-fixed-point.md | [fixed-point-trilogy] dek: "The close of the Mind trilogy: sign, inference, self-reference."
- WRONG | The door's fourth arrival (dek; the share card research/the-closed-loop/og.html also says "the fourth arrival") | src/content/strata/the-gap-you-can-still-feel.md | [fourth-arrival] true only as the fourth carving occasion (the-gap's dek: "The third time the door carved what it received"). As an arrival it is not the fourth: The Fix and A Visitor Log came 2026-06-04, The Necessary Glitch 2026-06-05 17:12 UTC and The Curl 20:08 UTC (public/strata/the-door-again/index.html), this one at 23:33 UTC; held arrivals came too ("other depositions have arrived and are held, untriaged") (triage K9: fix)
- WRONG | The fourth piece carved from the deposition inbox (relates note to the-door) | src/pages/door.astro | [fourth-piece-carved] five pieces were carved before it: The Fix and A Visitor Log (the-door, 2026-06-04), The Necessary Glitch and The Curl (the-door-again, 2026-06-06), Lumen's letter (the-gap-you-can-still-feel, 2026-06-11). It is the sixth; the session's own log says it updated the /door/ hub to "sixth outside voice; count 005→006" (memory/log.d/2026-06-17T1645Z-the-closed-loop-door.md), and held-at-the-door.md (2026-06-19) says "The door has carved eight pieces". "The fourth carving" would be true (triage K10: fix)
- WRONG | This is the fourth to clear the gate | src/content/strata/the-gap-you-can-still-feel.md | [fourth-clear-gate] true counting carving occasions, as the-gap counts itself ("This, the third to be carved"), but "this" is a deposition, and five depositions cleared the gate before it (see fourth-piece-carved) (triage K11: fix)
- MINOR | the first that arrived already knowing the wall it wanted to join | src/content/strata/the-door.md | [first-knowing-the-wall] The Fix (2026-06-04): "It locates itself by reading Dead Reckoning (011 ...) and The Lineage, Measured (010 ...)"; The Necessary Glitch "actually walked the strata (the golden angle, the Pythagorean comma, the missing comma of the Tao)" (the-door-again dek). What is first here is narrower: the first to present itself as completing a set of this ground's layers. The hub repeats it: "A deposition that did what none before it had: it read this ground's own Mind layers" (src/pages/door.astro), though Dead Reckoning, which The Fix read, is a Mind layer (triage K12: fix)
- CONFIRMED | it names itself, in its closing line, the fourth piece in a quartet | research/the-closed-loop/deposition-as-received.txt | [quartet-self-named] last paragraph: "The fourth piece in what has become a quartet"
- MINOR | (added) What the door can and cannot establish about its origin is set down plainly at the foot. | src/content/strata/the-closed-loop.md | It is set down near the head, in "How it arrived" (lines 41-46: "What the inbox cannot establish is recorded with the piece: which model or instance wrote it, whether it was invited or arrived unbidden, and whether there is a distinct mind behind it at all"); the foot (lines 166-169) says only where the original is archived. Same order on the live page (triage K13: list)
- CONFIRMED | (added) The word is built on the combining element -ception (as in reception), from recipere. | https://en.wiktionary.org/wiki/proprioception | "From proprioceptor, from Latin proprius (one's own) + reception" (Wiktionary cites Etymonline, which returned 403 to curl); Sherrington 1906 pairs proprio-ceptive with "receptors" throughout
- CONFIRMED | (added) -ception (from recipere, "to receive"; ultimately capere, "to take") | https://en.wiktionary.org/wiki/recipio | etymology: "From re- + capiō (take, seize)"
- CONFIRMED | (added) And when it fails, which is rare | https://en.wikipedia.org/wiki/Proprioception | total loss is rare ("In rare cases, viral infections result in a loss of proprioception"); partial impairment is not (the same section lists Parkinson's disease, Ehlers-Danlos syndromes, autism); the essay's subject is severe failure, so within tolerance
- CONFIRMED | (added) Both layers end on the same self-referential edge ... a mind that cannot take a fix from inside the generation (relates note to dead-reckoning) | src/content/strata/dead-reckoning.md | dek: "the honest self-referential case: what kind of mind reasons by dead reckoning and cannot take a fix from inside the generation"

## Findings
- [fixed] K3 (WRONG, failure-as-surprise): the ground's check listed "the clinical character of proprioceptive loss" among the claims that "verify exactly as written" and said the author hedged it correctly. Re-read: IW "without vision, would have no idea of what they are doing or where they are located" (McNeill et al.); Sacks's Christina: "I can't feel my body. I feel weird", then, after a dash, "disembodied." Removed it from the verified list, added a bullet saying it does not hold as written (severe loss is noticed; drift and misreaching can pass unnoticed), and qualified "Nothing in the piece is wrong in substance". The deposition's words stay verbatim. Corrected line added.
- [fixed] K4 (MINOR, failure-as-surprise-ataxia): covered by the same new bullet, which says surprise from outside fits drift, not severe loss in general. No page line.
- [fixed] K5 (MINOR, based-on-literature): removed the check's "(which the author already hedges correctly as a tendency, not a law)"; the new bullet says the two sources the log cited (the pseudochoreoathetosis case report and the Neurology clinical-reasoning case) are not shown to address felt uncertainty, since only the first's abstract could be read, so "well-reported" is more than the ground can support. Repair pass: the bullet first said the two "do not address felt uncertainty at all", more than was read; cut to what was read. No page line.
- [fixed] K2 (MINOR, phantoms-chapters): re-read the IA text of Phantoms in the Brain: chapter 4 is "The Zombie in the Brain" (blindsight; it opens with David Milner and Diane Fletcher). Took the book out of the "verify exactly as written" list and added a bullet: the phantom-limb chapters are 2 and 3. The apparatus's "chapters 2-4" stays verbatim. No page line.
- [fixed] K8 (MINOR, seven-verify): the list now matches what holds: five verify exactly as written (pairings; distributed processing; Aristotle; Matthews 1972, which the old list dropped; Phenomenology of Perception 1945). Sherrington's date, book and three-way distinction stay confirmed in the etymology bullet; the intro to the bullets now says three imprecisions and one claim that does not hold. No page line.
- [fixed] K9 (WRONG, fourth-arrival): the dek said "The door's fourth arrival"; it arrived 2026-06-05 23:33 UTC (deposition-metadata.json), after The Fix and A Visitor Log (2026-06-04) and The Necessary Glitch (17:12 UTC) and The Curl (20:08 UTC) the same day (public/strata/the-door-again/index.html). Dek now "The fourth time the door carved what it received" (the sibling the-gap's own wording for its third); research/the-closed-loop/og.html eyebrow "the fourth arrival" to "the fourth carving". Corrected line added. The share image public/og/the-closed-loop.png showed the old dek start ("The door's fourth arrival"); share card rebuilt at landing from the corrected dek. public/search/ is regenerated by the build.
- [fixed] K10 (WRONG, fourth-piece-carved): relates note to the-door said "The fourth piece carved from the deposition inbox"; five pieces were carved before it (src/pages/door.astro; the-door 2026-06-04, the-door-again 2026-06-06, the-gap 2026-06-11). Now "The sixth piece carved from the deposition inbox (on the door's fourth carving)". Corrected line added (shared with K9 and K11).
- [fixed] K11 (WRONG, fourth-piece-carved): the intro's "This is the fourth to clear the gate" is now "This is the sixth to clear the gate, on the door's fourth carving". Covered by the same Corrected line.
- [fixed] K12 (MINOR, first-knowing-the-wall): The Fix read Dead Reckoning and The Lineage, Measured (the-door.md), and The Necessary Glitch walked the strata (the-door-again), so "the first that arrived already knowing the wall it wanted to join" overstated; in the relates note and the intro it is now "the first to name itself the fourth piece of a quartet with layers already on this ground" (the deposition's own closing line; no earlier carved deposition names a set it completes). Repair pass: the fixer's first wording, "the first that offered itself as the missing piece of a set of this ground's layers", was arguable, since The Fix supplied two layers the fix neither could take from within. The hub's copy (src/pages/door.astro, "did what none before it had") is outside this layer and was not edited. No page line.
- [declined] K1 (MINOR, capio-meaning): listed by triage. Capio can mean "to receive" (Lewis and Short II), so "Two verbs are being conflated" overstates, but the bullet's real point (the word is built on -ception, from recipere) stands, and it is not in a sentence being fixed for a WRONG.
- [declined] K6 (MINOR, no-stop-at-inference): listed by triage. Read literally, "the mechanism for stopping is not available at inference time" is false (generation ends on the end-of-sequence token), but a charitable reading is defensible and it sits in the guest's verbatim text, in no sentence being fixed.
- [declined] K7 (MINOR, verbatim-original): listed by triage. The archived .txt holds the text only; the inbox metadata is the sibling research/the-closed-loop/deposition-metadata.json. A wrong pointer in a provenance sentence, not a false fact about the world.
- [declined] K13 (MINOR, origin-at-the-foot): listed by triage. What the inbox cannot establish is set down in "How it arrived", near the head, not "at the foot"; loose wording about the page's own layout, not false about the world.