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Audits

People almost never swallow spiders in their sleep.

Version 2. FactHub's auditors are automated reviewers, separate from the process that writes articles. Each checks a fixed, published list of things and grades the results with its own published rule. They can be wrong; an audit is not a human expert review. All auditors

Across versions

First Look

5 of 5 checks passed · version 1 · claude-haiku-5-5 · 13 October 2026

A: Passes the first look: nothing obviously wrong. Minor notes may be reported as feedback without lowering the grade.

5 checks
  1. Pass Title matches the evidence

    Title 'People almost never swallow spiders in their sleep' matches the finding False and the specialist and no-record evidence.

  2. Pass No obvious contradictions

    Finding, answer and conclusion agree that the eight-per-year claim is unsupported; the origin-story discussion is consistent across sections.

  3. Pass Plausible justification

    Conclusion explains the rating from the absence of any study or documented case and the specialist assessment of plausibility.

  4. Pass Sources are relevant

    Burke Museum, UC ANR, Snopes disclosure, Guardian 1999 and the spider photo are plausibly on topic by name, title and role.

  5. Pass Common questions answered

    Three objections are listed, and each has a response that addresses its specific question.

Coverage: Read the full article payload; sources judged by name/title/description/role only, per First Look's rules; no source snapshots read.

Overall Review

4 of 6 checks passed · version 1 (draft auditor) · claude-opus-5-5 · 11 October 2026

B: Most claims are accurate, with only minor errors, overstatements, or omissions that don't change the core message, or a check the auditor could not complete. Sourcing is generally solid and framing largely fair.

6 checks · 2 concerns
  1. Concern (minor) Central claims are accurate

    Change the UC ANR evidence year from 2020 to 2021: the cited Bug Squad article is dated March 23, 2021.

    Summary: the article rates the 'eight spiders per year while sleeping' claim False, saying no study supports it, specialists consider it extraordinarily unlikely, and the Lisa Holst origin story is a Snopes fabrication. Claim ratings: (1) No study or formal record supports the average - True; Burke: 'No such case is on formal record anywhere in scientific or medical literature.' (2) The rumor appears in inconsistent numerical forms - True; Burke cites four per year, 20 per lifetime, a pound per lifetime; Guardian says eight per lifetime. (3) Specialists describe even one ingestion as extraordinarily unlikely - True; Burke: 'so many highly unlikely circumstances that for practical purposes we can rule out the possibility.' (4) No credible eyewitness account of a spider trying to enter a sleeper's mouth - True (Burke). (5) UC Davis's Kimsey rejects a version of nighttime swallowing - True; quote 'This never happens' responds to the '25 percent of protein' version, and the article correctly says 'a version'. But the evidence item lists years [2020]; the article is dated March 23, 2021 (2020 is only the year of Kimsey's award) - Mostly True, peripheral date error. (6) Snopes says Holst and PC Professional do not exist, the name is an anagram of 'This is a big troll', created April 2001 - True. (7) Guardian 1999 list includes eight-in-a-lifetime version - True (item 12). (8) Origin unknown - True; Snopes: 'We're still on the hunt for the origins.' Central claims accurate; one peripheral date error. Confidence: High.

    About evidence:ucd-entomology-corroboration, source:ucanr-spider-myth-source The finding

  2. Concern (minor) Claims are supported and labeled

    Cite a source for the airflow, heartbeat, vibration and snoring mechanism in key points and summary, or reword to the Burke page's 'huge breathing monster' point.

    Central claims are backed by cited evidence. However, a key point states 'A sleeping person's breathing, movement, heartbeat, and possible snoring create airflow and vibration; arachnid experts describe deliberate entry into the mouth as extraordinarily unlikely,' and the summary attributes 'airflow and vibration' to the Burke curator. The Burke page, the only source cited for this, says only that the author is 'unconvinced that a spider would visit a huge breathing monster and enter its mouth'; it mentions no heartbeat, vibration, or snoring. The mechanism is a plausible inference but is presented as expert-sourced. Peripheral to the finding, which rests on absence of records and the curator's overall judgment. Facts, inferences, and limits are otherwise clearly separated (editorial note, limitations). Confidence: High.

    About conclusion, evidence:burke-arachnology-assessment, source:burke-spider-myth-source The finding

  3. Pass Sourcing is strong and transparent

    Biological plausibility rests on the Burke Museum arachnology page (university museum specialist) and UC Davis/Bohart Museum director Lynn Kimsey via UC ANR outreach; origin claims rest on Snopes' own disclosure about its fabrication (a primary source for that fact) and the original 1999 Guardian page (primary dated example). Each evidence item names its sources and sources carry clear role labels. These are expert outreach pages rather than peer-reviewed studies, but for a claim with no underlying study this is the appropriate evidence and the article says so in its limitations. Confidence: High.

  4. Pass Context is complete

    The article gives the needed context: variant numbers, the fabricated origin, the 1999 circulation date, and the caveat that one-off accidents cannot be excluded. The Burke page also mentions anecdotes (a spider in an ear, a ballooning spider blowing into an awake child's mouth) that the article omits, but these concern waking people or ears and do not change the impression about swallowing during sleep. Snopes' note that the cited 1954 book does not contain the claim is also omitted but is incidental. Confidence: High.

  5. Pass Framing is fair and neutral

    The claim is stated as it circulates ('The average person swallows eight spiders per year while sleeping'), and objections are answered without ridicule. Calling the Holst story 'fabricated' is accurate given Snopes' own statement. The title 'People almost never swallow spiders in their sleep' is hedged rather than absolute. No loaded or partisan framing. Confidence: High.

  6. Pass Uncertainty is stated

    The article states that absence of documented cases cannot prove no accidental ingestion has occurred ('lower for absolute claims that no isolated accidental ingestion has ever occurred'), that the biological discussion is expert explanation rather than experiment, that the 1999 example shows circulation not first publication, and that the origin remains unknown. Confidence High is scoped to the eight-per-year average, which is supported. Confidence: High.

Coverage: Read the full article payload and all five cited sources via get_source_snapshot (all live copies, HTTP 200, none archived): Burke Museum spider-myth page, UC ANR Bug Squad article (March 23, 2021), Snopes 'tHis is a Big troLl' disclosure, Guardian 29 Sep 1999 '50 top pieces of trivia', and the Wikimedia Commons image page. No sources were unreadable. No live web search was used; no outside studies on spider ingestion were consulted.

Skeptic

4 of 5 checks passed · version 2 (draft auditor) · claude-opus-5-5 · 11 October 2026

A: The rating and confidence follow from the evidence, the article rates the real claim, and the strongest objections are answered. A single minor note for the author does not lower the grade.

5 checks · 1 concern
  1. Concern (minor) Strongest objections answered

    Add an objection addressing whether swallowing would go unnoticed during sleep, so the absence of medical records is expected rather than informative.

    The objections cover one-off accidents, the precision of 'eight', and the Holst origin story. The strongest natural objection is not stated: a sleeper would not notice swallowing a small spider, so the absence of medical records or eyewitness reports is what one would expect even if it happened often. Much of the evidence ('No formal scientific or medical record', no eyewitness account) is of exactly this kind. The article partly answers it through the biological implausibility argument and the caveat that absence of records cannot exclude accidents, so a reader's belief would likely be unchanged, but the objection should be named and answered directly with the behavioral evidence. Minor.

    About conclusion, evidence:burke-arachnology-assessment, limitation:burke-arachnology-assessment The finding

  2. Pass Rates the real claim

    The claim 'The average person swallows eight spiders per year while sleeping' matches the common circulating form, and the article scopes itself to that population average ('not an absolute assertion about every possible accidental ingestion'). It acknowledges variant forms (lifetime counts, other numbers) without swapping in an easier version. The conclusion stays within the claim: it calls the average unsupported and false while lowering confidence on absolute impossibility. I would rate the same claim. Confidence: High.

  3. Pass Rating follows from the evidence

    Before reading the verdict I would choose False: the evidence as stated is that no measurement or formal record supports the figure, an arachnology curator finds even one ingestion extraordinarily unlikely, a separate university entomologist rejects nighttime swallowing, and the numbers vary across retellings. 'No evidence' would be the adjacent alternative if only the absence of a source were shown, but the affirmative expert implausibility assessment moves it to False for a recurring average of eight per year. The article's finding (False) and answer ('The figure has no scientific source, and spider behavior makes the scenario highly unlikely') agree with this. Confidence: High.

  4. Pass Confidence matches the evidence

    High confidence rests on expert assessments rather than systematic data, which is thin in kind, but the article scopes it carefully: 'High that the claimed average of eight per year is unsupported and false; lower for absolute claims that no isolated accidental ingestion has ever occurred.' The limitations state that the Burke item is not a systematic review and that the UC item has no original data. The title 'People almost never swallow spiders in their sleep' is hedged consistently with the evidence. For an eight-per-year average, High is warranted: such a frequency would be hard to reconcile with the stated absence of any formal case. I would give High. Confidence: Medium-High.

  5. Pass Evidence is independent

    The two plausibility items come from different institutions and people (Burke Museum, University of Washington; Bohart Museum/UC Davis via UC ANR), with no indication one derives from the other. The origin item rests on separate sources (Snopes disclosure and a 1999 Guardian list) and addresses a different question. Both plausibility items are expert opinion rather than data, but that is a calibration point, not dependence. Confidence: Medium-High.

Coverage: Evaluated the article payload only (claim, finding, answer, confidence, title, summary, context, conclusion, three evidence items with limitations, objections, method steps, editorial note). Per the Skeptic's division of labor, evidence was taken as stated and source snapshots were not read for this run. No live web was used.

Standards

5 of 7 checks passed · version 3 (draft auditor) · claude-opus-5-5 · 11 October 2026

B: Meets the standard, with several things to polish.

7 checks · 2 concerns
  1. Concern (minor) Title states the finding

    Change seoTitle to state the finding, e.g. "Do People Swallow Eight Spiders a Year in Their Sleep? No, the Figure Is a Myth".

    Title 'People almost never swallow spiders in their sleep.' names the subject, resolves the claim, does not repeat the myth, and uses negative wording where the finding is essentially rarity/absence of evidence, which the rule permits. Rule: 'seoTitle may use the wording people search with as long as it states the finding.' The seoTitle 'Do People Swallow Eight Spiders a Year in Their Sleep?' only poses the question and does not state the finding. Minor per the rule ('a seoTitle that does not state the finding').

    About conclusion The finding

  2. Concern (minor) Each section does its job

    Shorten the summary to one sentence naming the Burke Museum and UC Davis assessments and the Snopes disclosure; move the remaining detail to evidence or key points.

    Rule: 'summary is one sentence naming the strongest independent lines of evidence.' The summary is seven sentences that restate the content of each evidence item (Burke curator's reasoning, UC Davis outreach, varying numbers, Holst story, 1999 list), duplicating the evidence section. Other fields comply: keyPoints state what the evidence establishes; context is one concise framing paragraph; the conclusion synthesizes, weighs limits, connects to confidence, and states what remains unproven (isolated accidents, true origin); the editorialNote gives scope, caveats, and 'No external specialist review has been recorded.' Minor (one field carrying content that belongs elsewhere).

    About conclusion, evidence:burke-arachnology-assessment, evidence:ucd-entomology-corroboration, evidence:origin-story-audit The finding

  3. Pass Verdict fields agree and stand alone

    Read as: FactHub rates the claim "The average person swallows eight spiders per year while sleeping." False (High confidence): The figure has no scientific source, and spider behavior makes the scenario highly unlikely. The claim is the circulating assertion, not its correction, and reads naturally in quotes. The answer says what is true. Title ('almost never'), description, summary, conclusion ('unsupported and false'), and socialTitle ('is a Myth') all express the same conclusion; the changelog notes the label was standardized and no stale free-text wording remains.

  4. Pass Limitations are specific

    Each limitation is item-specific: Burke 'is a specialist museum assessment, not a systematic database review... cannot exclude every unobserved accident'; UC item 'does not present original data or quantify the probability of a rare accident'; origin item 'The 1999 item is evidence of circulation, not the rumor's first appearance'. None is boilerplate.

  5. Pass Tone is measured and respectful

    Language is measured: 'extraordinarily unlikely', 'no credible basis', 'lower for absolute claims that no isolated accidental ingestion has ever occurred', title 'almost never'. 'Fabricated' describes the Holst attribution, which the article supports with the publisher's own disclosure. 'It never happens' is attributed as a quotation. Objection responses are short and evidence-based, with no ridicule of people who repeat the claim.

  6. Pass Readers can verify it

    Every source has a specific role label (e.g., 'Primary specialist assessment of biological plausibility and documented cases', 'Dated evidence of pre-2001 rumor circulation'), full title, identifier, and a description of why it was chosen; key claims are anchored to the original publisher pages (Burke, UC ANR, Snopes, Guardian dated 29 September 1999). Method steps cover claim definition (step 1), prioritizing specialist and independent sources (step 2), sources reviewed and traceability (steps 3-4), and recorded limits (steps 3, 5).

  7. Pass Consistent house style

    American spelling throughout; dates in reader-visible text use one style ('September 1999', 'April 2001'); names are consistent (Burke Museum, Lynn Kimsey, Bohart Museum, Lisa Birgit Holst / Lisa Holst, PC Professional, Snopes); technical terms like 'arachnology' are self-evident in context. No typos or leftover drafting text found. Metadata fields were not compared, per the rule.

Coverage: Evaluated only the article payload: title, seoTitle, description, claim, finding, answer, confidence, summary, keyPoints, context, conclusion, evidence items and limitations, objections, method steps, editorialNote, image caption and alt text, sources, and changelog. No sources or live web were used, per the Standards scope.