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Evidence record

How much of human history has been lost?

Every sentence on the exploration belongs to at least one claim below. Each says what kind of statement it is, what it rests on, what the evidence does not establish, and how far it was checked. Nothing here is a score, and none of it is a verdict on a belief or a theory.

Last checked 19 October 2026.

  • A judgement, not a fact: 20
  • Source checked: 22
  • Presented as open: 3
  • Partly checked: 2

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.

What the question takes for granted

A historical question whose answer is a fraction with an unknown denominator. Cases of loss can be measured where something else records what existed; the total cannot, and the page says so.

  • More was written than survives

    Established

    Shown case by case, where a later source records works that no longer exist, as with the plays of Sophocles.

  • What survives is shaped by conditions, not chosen as a sample

    Established

    Papyrus survives where it is kept dry and is lost where it is not, and UNESCO directs its preservation work at places hit by conflict or disaster.

  • The fraction lost could in principle be measured

    Open

    Only where some independent record says what existed. For societies without writing, or never written about, there is no denominator, which is the page’s point.

How the question is labelled

Claim: Lost history

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Lost history

Kind
Framing. Signposting. It asserts nothing a source could check.

The question

Claim: The record is not a summary of the past. It is what happened to survive.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s thesis, in its subtitle. It follows from claims 14 and 23: papyrus survived where it was dry and was thrown away, not where someone chose to keep it.

Claim 3 · checked 24 September 2026 · AI-assisted audit

Claim: Written history covers a small fraction of human existence

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

The arithmetic of claims 7 and 8.

  • Supports

    Homo sapiens, in the Human Origins collectionspecies overview

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Reference work

    The source reads: During a time of dramatic climate change 300,000 years ago, Homo sapiens evolved in Africa.

  • Supports

    Information Revolutions and Information Transitions: Counting, Sealing, Writing in Iran 10,000–300 BCsection on Late Susa II

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: Before the end of the fourth millennium BC, an integrated system of tokens, seals, and tablets enmeshed in a bureaucratic system culminated in the development of true writing in two major cuneiform scripts

Later work looked for

See claims 7 and 8, whose figures this sentence rests on.

Claim 4 · checked 24 September 2026 · AI-assisted audit

Claim: and what survives from that fraction is filtered by material, climate, politics and luck.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A summary of the known section: material and climate in claim 14, conflict and disaster in claim 15, and the accident of a rubbish dump in claim 23.

  • Context

    The Oxyrhynchus PapyriWaste Paper City page

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: The reason we know so much, and in such detail, is rubbish.

Claim 5 · checked 24 September 2026 · AI-assisted audit

Claim: The size of the gap can be bounded but not measured.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s judgement, argued in claims 31 and 32: a loss can be counted only where something records what existed.

Claim 6 · checked 24 September 2026 · AI-assisted audit

Claim: Our species has existed for something like three hundred thousand years.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Homo sapiens, in the Human Origins collectionspecies overview; “When Lived”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Reference work

    The source reads: During a time of dramatic climate change 300,000 years ago, Homo sapiens evolved in Africa.

What this does not establish

A round figure from the fossil record, as the Smithsonian gives it.

Later work looked for

Crossref, 2018 on, "earliest Homo sapiens fossils age Jebel Irhoud": an author correction and commentary on the 2017 Jebel Irhoud dating, nothing that moves the round figure.

Corrected

24 September 2026. Previously: “Anatomically modern humans have existed for something like three hundred thousand years.” The Smithsonian gives the date for the species, Homo sapiens. "Anatomically modern" is a narrower description, which the source does not attach to that date.

Claim 7 · checked 24 September 2026 · AI-assisted audit

Claim: Writing is about five thousand years old.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

The date is for the earliest writing in Mesopotamia and Iran, which the cited study calls true writing. How the accounting tokens that came before it connect to it is, in the same study’s words, under debate.

Later work looked for

Crossref, 2020 on, "proto-cuneiform Uruk earliest writing date": handbook chapters and preprints, nothing that moves the date.

Claim 8 · checked 24 September 2026 · AI-assisted audit

Claim: For more than 98% of our species’ existence, nothing was written down.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Five thousand years is 1.7 per cent of three hundred thousand, so the figure holds across the range of both estimates.

What this does not establish

The figure is about writing, which is what claims 7 and 8 date. It says nothing about other durable marks.

Later work looked for

Arithmetic on claims 7 and 8; see their searches.

Corrected

24 September 2026. Previously: “For more than 98% of our species’ existence, nobody was recording anything that could survive.” The arithmetic is about writing. People made durable marks long before writing, so "nobody was recording anything that could survive" said more than the figures do.

Claim 9 · checked 24 September 2026 · AI-assisted audit

Claim: And within that final two percent, what reaches us is not a representative sample. It is a heavily biased selection.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Introduces the known section, where claims 14, 15 and 23 carry the bias.

Claim 10 · checked 24 September 2026 · AI-assisted audit

What survived, and why

Claim: What survived, and why

Kind
Framing. Signposting. It asserts nothing a source could check.

Survival depends on material and climate

Claim: Survival depends on material and climate

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus PapyriIntroduction page, “Greek Papyri and Oxyrhynchus”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: By the end of the eighteenth century a few papyri had been discovered in Egypt, the country whose dry climate is most favourable to their survival

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page, “Priceless rubbish”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: In the dumps was something which the famous sites of classical Greece and Italy could not preserve: papyrus, the ancient equivalent of paper.

What this does not establish

The source speaks for papyrus. The heading generalises from it, and the section adds conflict and disaster in claim 15.

Later work looked for

How preservation of papyrus works; not a finding later work revises. Crossref, 2018 on, "Oxyrhynchus papyri rubbish mounds": new volumes of texts, nothing that changes it.

Claim 12 · checked 24 September 2026 · AI-assisted audit

Claim: What survives is not a sample of what existed.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of claims 14 and 15.

Claim 13 · checked 24 September 2026 · AI-assisted audit

Claim: Papyrus lasts in the parts of Egypt where it never rains, and the famous sites of Greece and Italy could not preserve it.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page, “Priceless rubbish”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: In this part of Egypt it never rains; perishables which are above the reach of ground water will survive. In the dumps was something which the famous sites of classical Greece and Italy could not preserve: papyrus, the ancient equivalent of paper.

What this does not establish

Herculaneum is the exception the page itself describes in claim 25: papyrus there survived carbonised, not dry.

Later work looked for

Crossref, 2018 on, "Oxyrhynchus papyri rubbish mounds": nothing that changes it.

Corrected

24 September 2026. Previously: “Documentary heritage is registered and protected because it is fragile and unevenly distributed, which is the premise of the programme cited here, and the unevenness runs by material and by climate as much as by anything anyone chose to keep.” UNESCO’s programme pages, read in full, say nothing about uneven distribution or about material and climate, so the sentence was attributing a premise to them that they do not state. Material and climate now rest on the Oxyrhynchus project, which says both, and UNESCO is cited for what its pages do say.

Claim 14 · checked 24 September 2026 · AI-assisted audit

Claim: UNESCO set up its programme for documentary heritage in 1992 “to guard against the collective amnesia”, and directs its preservation work particularly at places affected by conflict or natural disaster.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Memory of the World ProgrammeAbout the programme

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: UNESCO launched the Memory of the World (MoW) Programme in 1992 to guard against the collective amnesia

  • Supports

    Memory of the World Programmeprogramme page, objectives

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Facilitate preservation of the world's documentary heritage, particularly in areas affected by conflict and/or natural disaster

Corrected

24 September 2026. Previously: “Documentary heritage is registered and protected because it is fragile and unevenly distributed, which is the premise of the programme cited here” The programme’s pages do not state the premise the page gave them. This is what they say.

Claim 15 · checked 24 September 2026 · AI-assisted audit

Claim: That is a distortion in the record before any historian touches it. Which materials last, and where, is a question about chemistry, weather and war rather than about importance.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claims 14 and 15.

Corrected

24 September 2026. Previously: “Which materials last, and where, is a question about chemistry and weather rather than about importance.” The paragraph before now carries conflict and disaster as well as climate.

Claim 16 · checked 24 September 2026 · AI-assisted audit

We can measure the loss in specific cases

Claim: We can measure the loss in specific cases

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The heading’s claim is shown by claims 19 and 20, one case where the loss has a number.

Claim 17 · checked 24 September 2026 · AI-assisted audit

Claim: Some of what was written is known only by name.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts

    The source reads: These Egyptian Greeks read Greek tragedies that to us had just been names

Corrected

24 September 2026. Previously: “Ancient authors cite works that no longer exist. Library catalogues list holdings that did not survive.” Neither sentence had a source, and the library catalogues were named without any example. The narrower statement is what the cited project says.

Claim 18 · checked 24 September 2026 · AI-assisted audit

Claim: The Suda, a tenth-century Byzantine encyclopedia, credits Sophocles with 123 plays.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Suda, sigma 815: Sophoclessigma 815, translation

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Texts · Primary text

    The source reads: He taught 123 plays (or as some say, many more), and won twenty-three victories.

  • Supports

    Suda, sigma 815: SophoclesSuda On Line home page, “About the Suda On-Line”

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026

    The source reads: The Suda is a massive 10 th century Byzantine Greek historical encyclopedia

What this does not establish

A count recorded in the tenth century, long after Sophocles, and the entry itself adds that some said many more.

Corrected

24 September 2026. Previously: “Of the plays of Sophocles, seven survive out of more than a hundred known to have been written.” The passage cited nothing for the count. The number now comes from the source that records it, attributed, since it is an ancient tally rather than a known total.

Claim 19 · checked 24 September 2026 · AI-assisted audit

Claim: Seven survive, and of the rest only fragments remain.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

Corrected

24 September 2026. Previously: “That ratio is not unusual.” A generalisation across ancient literature with no source behind it. Removed rather than left standing on one example.

Claim 20 · checked 24 September 2026 · AI-assisted audit

Claim: The Oxyrhynchus papyri come from the rubbish dumps of a town in Egypt, and the project holding them calls the collection the largest of its kind in the world.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus Papyrihome page

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: comprises thousands of texts on papyrus and parchment and is the largest of its kind in the world

  • Supports

    The Oxyrhynchus PapyriIntroduction page, “Greek Papyri and Oxyrhynchus”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Many other cities in Egypt got their Greek names in the same way ... Oxyrhynchus was the chief town of its district ... What Grenfell and Hunt found was the rubbish of Oxyrhynchus

Corrected

24 September 2026. Previously: “The Oxyrhynchus papyri (a rubbish dump in Egypt whose collection the project holding it calls the largest of its kind in the world) has yielded” The papyri were called a rubbish dump. They come from the dumps of a town, which is what the project says.

Claim 21 · checked 24 September 2026 · AI-assisted audit

Claim: They have given back authors famous in antiquity and lost in the Middle Ages, Sappho and Menander among them, alongside private letters, shopping lists and tax returns.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Texts

    The source reads: Oxyrhynchus restores to us authors famous in classical times, who went under in the Middle Ages: the songs of Sappho, the sitcom of Menander

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Oxyrhynchus yielded a huge random mass of everyday papers – private letters and shopping lists, tax returns and government circulars

What this does not establish

The authors come back in fragments, not whole works.

Corrected

24 September 2026. Previously: “has yielded previously unknown works by major authors, tax records, private letters and shopping lists.” Names the authors the project names, in the project’s terms.

Claim 22 · checked 24 September 2026 · AI-assisted audit

Claim: They survived because a town threw them away in a place where it never rains.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Oxyrhynchus PapyriWaste Paper City page, “Priceless rubbish”

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites

    The source reads: The town dumps of ancient Oxyrhynchus remained intact right up to the late nineteenth century. They didn’t look exciting, just a series of mounds covered with drifting sand. But they offered ideal conditions for preservation. In this part of Egypt it never rains

Corrected

24 September 2026. Previously: “It exists because of local climate and municipal waste disposal.” Follows the rewritten sentence before it, and says in the project’s terms what the climate was.

Claim 23 · checked 24 September 2026 · AI-assisted audit

Some of the loss is being reversed

Claim: Some of the loss is being reversed

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org/firstscroll, announcement of 25 June 2026

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026 · Artefacts and sites

    The source reads: It is the first Herculaneum papyrus to be digitally unrolled and read in full, end to end

Claim 24 · checked 24 September 2026 · AI-assisted audit

Claim: Hundreds of scrolls carbonised by the eruption of Vesuvius in 79 CE have stayed sealed and unreadable since they were dug up in the eighteenth century.

Kind
Historical claim. A statement about the past that historical evidence can test.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org, “Our story”, 79 AD and 1750

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026 · Artefacts and sites

    The source reads: Vesuvius erupts, burying a villa and its library of papyrus scrolls under twenty meters of ash. The scrolls are carbonized by the heat ... Excavations unearth hundreds of scrolls, too fragile to unroll.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org, “Our story”, 1750

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026

    The source reads: Early attempts to open the scrolls destroy many; hundreds remain unopened. ... More than six hundred remain unread.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org/firstscroll, announcement of 25 June 2026

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026

    The source reads: Hundreds of rolls have therefore remained sealed, their contents preserved yet unreachable.

What this does not establish

Some were opened by hand and read in part, and many were destroyed in the attempt; the sentence is about those that stayed closed.

Corrected

24 September 2026. Previously: “Scrolls carbonised by the eruption of Vesuvius in 79 CE were unreadable for centuries.” A few were unrolled by hand and read, so "unreadable" applies to those still sealed, which is how the source puts it.

Claim 25 · checked 19 October 2026 · AI-assisted audit

Claim: High-resolution X-ray scanning combined with machine learning now reads them without unrolling them

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org/firstscroll

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026 · Artefacts and sites · Measurement

    The source reads: we scanned it with high-resolution X-rays, reconstructed the wound sheet inside the volume, flattened it into a readable surface, and used machine learning to bring out the faint traces of ancient ink.

What this does not establish

One scroll has been read in full, by the project’s own account of 25 June 2026, and hundreds of rolls remain sealed.

Later work looked for

Crossref, 2025 on, "Herculaneum papyrus virtual unwrapping ink detection": further ink-detection and imaging papers in 2026, none that revises the reading.

Corrected

24 September 2026. Previously: “High-resolution imaging combined with machine learning” Names the imaging the project used.

Claim 26 · checked 24 September 2026 · AI-assisted audit

Claim: in 2026 the surviving core of one scroll, PHerc. 1667, became the first to be read end to end.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org/firstscroll, “PHerc. 1667 – read in full”

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026 · Artefacts and sites · Measurement

    The source reads: destroyed its outer layers and left only the compact inner core, about 8 cm of an original height of 19–24 cm. From that surviving portion we have now recovered and read the text in full

  • Supports

    The Vesuvius Challenge: reading the Herculaneum scrollsscrollprize.org/firstscroll, announcement of 25 June 2026

    Cited · Link answered, 19 October 2026 · Read in full, 19 October 2026

    The source reads: It is the first Herculaneum papyrus to be digitally unrolled and read in full, end to end

What this does not establish

The project’s own announcement, dated 25 June 2026; the transcription is in a preprint that was not read.

Later work looked for

Crossref, 2025 on, "Herculaneum papyrus virtual unwrapping ink detection": nothing later than the announcement that changes it.

Corrected

24 September 2026. Previously: “the first scroll was recovered end to end in 2026, out of forty-five scanned.” What was read is the surviving inner core, earlier attempts to open the roll having destroyed its outer layers; and the forty-five scanned are scrolls and fragments, not scrolls.

19 October 2026. Previously: “in 2026 the surviving core of one scroll, PHerc. 1667, became the first to be read end to end, and forty-five scrolls and fragments have been scanned.” The count of scrolls and fragments scanned was a live counter on the project’s home page, which a redesign removed, and no dated source read gives it. The sentence keeps the dated reading of PHerc. 1667 and drops the count.

Claim 27 · checked 19 October 2026 · AI-assisted audit

Claim: This is genuinely new: material that was written off as destroyed is producing readable Greek.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s judgement on claims 26 and 27. That the text is Greek is the project’s report.

Claim 28 · checked 24 September 2026 · AI-assisted audit

How much there was to lose

Claim: How much there was to lose

Kind
Framing. Signposting. It asserts nothing a source could check.

How much was ever written down

Claim: How much was ever written down

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Estimating what has been lost requires estimating what existed, which is only possible where independent records mention it.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A point of method, shown by claims 19 and 20, where a later record supplies the total.

Claim 31 · checked 24 September 2026 · AI-assisted audit

Claim: For societies without that scaffolding, the size of the original corpus is unknown, and so the fraction lost is unknown.

Kind
Open question. Something the page says is not known.
Review
Presented as open. The page says this is unresolved, and the review found that it is.

Claim 32 · checked 24 September 2026 · AI-assisted audit

Which undeciphered scripts contain what

Claim: Which undeciphered scripts contain what

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Linear A, the Indus Valley script, Rongorongo and others remain undeciphered.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

Claims of decipherment keep appearing, including in preprints the currency search found; the sources cited here, the latest from 2024, describe all three as undeciphered.

Other readings

Farmer, Sproat and Witzel argue that the Indus signs are not a script at all, in which case there is nothing to decipher (claim 35).

Claim 34 · checked 24 September 2026 · AI-assisted audit

Claim: For the Indus symbols the argument is not only about reading them but about whether they encode speech at all: Farmer, Sproat and Witzel hold that they were not evolving in linguistic directions after at least six hundred years of use and worked like the non-linguistic sign systems of the Near East, and Rao and colleagues find the conditional entropy of the sequences closer to natural languages than to the non-linguistic systems it was tested against.

Kind
Disputed. A contested point, where the page reports a side or the disagreement.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

A statistic that separates language from other sign systems is itself argued: the page reports both sides without taking one.

Later work looked for

Crossref, 2015 on, "Indus script linguistic nonlinguistic decipherment": only unreviewed preprints claiming decipherment; nothing that settles the dispute.

Corrected

24 September 2026. Previously: “one side holds that they were not evolving in linguistic directions after six hundred years of use and worked like the non-linguistic sign systems of the Near East, and the other finds” A disputed position is attributed to who holds it, and the source says "at least 600 years".

Claim 35 · checked 24 September 2026 · AI-assisted audit

Claim: Where a script does carry language and cannot be read, we know a society wrote without knowing what it said.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of claim 34, conditional on the script carrying language.

Claim 36 · checked 24 September 2026 · AI-assisted audit

The unrecorded majority

Claim: The unrecorded majority

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Section title; its claim is the arithmetic of claim 9.

Claim 37 · checked 24 September 2026 · AI-assisted audit

Claim: Almost all of the human past left no written record at all.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of claim 9, which measures time: the span of the species’ existence before writing. It is not a count of people. Bones and genomes are traces rather than written records, which the page takes up in claim 50.

Corrected

24 September 2026. Previously: “Almost everyone who has ever lived left no record at all.” Integrity pass: the line was offered as a reading of claim 9, which measures the span of the species' existence, not the number of people who lived in it. A share of time is not a share of people, so the line now says what the arithmetic carries.

Claim 38 · checked 24 September 2026 · AI-assisted audit

What we do not know that we do not know

Claim: What we do not know that we do not know

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: A society that built in perishable materials and was never mentioned by literate neighbours can leave almost nothing behind.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Follows from claim 14: what does not last leaves nothing to find.

Corrected

24 September 2026. Previously: “Entire societies leave no trace when they build in perishable materials and are not mentioned by literate neighbours.” A society that left no trace could not later be found, which the same paragraph says happens. Stated as a possibility rather than a rule.

Claim 40 · checked 24 September 2026 · AI-assisted audit

Claim: There is no method for counting such societies.

Kind
Open question. Something the page says is not known.
Review
Presented as open. The page says this is unresolved, and the review found that it is.

Claim 41 · checked 24 September 2026 · AI-assisted audit

Claim: The evidence that one existed arrives when it is found, and finds still arrive

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Introduces the example in claim 43.

Corrected

24 September 2026. Previously: “The only evidence they existed arrives when one is accidentally found, which happens regularly.” "Accidentally" and "regularly" had no source, and the finds that change the picture now often come from deliberate survey. The claim is narrowed and given an example the cited study reports.

Claim 42 · checked 24 September 2026 · AI-assisted audit

Claim: fieldwork and lidar in the Upano Valley of Amazonian Ecuador have revealed a dense system of urban centres occupied from around 500 BCE.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Two thousand years of garden urbanism in the Upper Amazonabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: A dense system of pre-Hispanic urban centers has been found in the Upano Valley of Amazonian Ecuador

  • Supports

    Two thousand years of garden urbanism in the Upper Amazonabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026

    The source reads: Archaeological excavations date the occupation from around 500 BCE to between 300 and 600 CE.

  • Supports

    Two thousand years of garden urbanism in the Upper AmazonDiscussion and conclusion; section on dating

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: The results of fieldwork and LiDAR analysis demonstrate that the Upano Valley was densely populated around the beginning of CE

  • Supports

    Two thousand years of garden urbanism in the Upper Amazonsection on dating

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Observational study: associations, not causes

    The source reads: The original building of earthen platforms and roads took place between ca. 500 BCE and 300/600 CE

What this does not establish

It does not say how much of the valley’s archaeology was known before the survey, and the page offers it as an example of a find, not of a society that built in perishable materials.

Later work looked for

Crossref, 2024 on, "Upano Valley garden urbanism": the 2024 paper is the latest; nothing that revises it.

Claim 43 · checked 24 September 2026 · AI-assisted audit

What oral traditions carried

Claim: What oral traditions carried

Kind
Framing. Signposting. It asserts nothing a source could check.

Claim: Knowledge transmitted orally (navigation, medicine, ecology, law, history) lasts only as long as each generation passes it on, and where that holds it can last a very long time.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The first half is what oral transmission is; the second is shown by claim 46.

Corrected

24 September 2026. Previously: “Knowledge transmitted orally (navigation, medicine, ecology, law, history) can persist for many generations and then vanish within one when transmission is interrupted.” "Vanish within one" generation was a specific claim cited to a documentary-heritage register that does not make it. Restated as what follows from oral transmission itself, with the persistence carried by the cited study.

Claim 45 · checked 24 September 2026 · AI-assisted audit

Claim: Aboriginal Australian stories from twenty-one places along the coast describe the sea rising over land, and the study cited here argues that in most instances they plausibly refer to events more than about seven thousand years ago, when the sea reached its present level.

Kind
What scholars argue. A report of what specialists argue, or where they disagree.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

  • Supports

    Aboriginal Memories of Inundation of the Australian Coast Dating from More than 7000 Years Agoabstract, first sentence

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Stories belonging to Australian Aboriginal groups tell of a time when the former coastline of mainland Australia was inundated by rising sea level.

  • Supports

    Aboriginal Memories of Inundation of the Australian Coast Dating from More than 7000 Years Agoabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Texts · Observational study: associations, not causes

    The source reads: Stories are presented from 21 locations from every part of this coastline. In most instances it is plausible to assume that these stories refer to events that occurred more than about 7000 years ago, the approximate time at which the sea level reached its present level around Australia.

What this does not establish

Read only as the abstract. The dating is by matching the details of each story to the sea-level curve, not by any date carried in the stories themselves.

Later work looked for

Crossref, 2016 on, "Aboriginal oral tradition sea level rise memory": Nunn’s 2018 book extends the argument; nothing that contradicts it was found.

Corrected

24 September 2026. Previously: “Aboriginal Australian traditions from twenty-one places along the coast describe the sea rising over land, which the study cited here matches to inundation more than seven thousand years ago.” The authors say it is plausible in most instances, not that each story is matched. The hedge is theirs and now on the page.

Claim 46 · checked 24 September 2026 · AI-assisted audit

Claim: That raises the question of how much else was once carried this way and is now gone.

Kind
Open question. Something the page says is not known.
Review
Presented as open. The page says this is unresolved, and the review found that it is.

Claim 47 · checked 24 September 2026 · AI-assisted audit

What might still be recovered

Claim: What might still be recovered

Kind
Framing. Signposting. It asserts nothing a source could check.

Most of the past is unrecoverable in principle

Claim: Most of the past is unrecoverable in principle

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A possibility the page sets out in its possible section, argued in claim 50.

Claim 49 · checked 24 September 2026 · AI-assisted audit

Claim: If most human experience was never recorded in a durable medium, no future technology recovers it. What can be reconstructed is limited to what left physical traces, bones, tools, isotopes, genomes, sediment.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

A conditional argument. Claim 9 bears on its premise without settling it: it measures the span of time before writing, not how many lives were lived in it.

Claim 50 · checked 24 September 2026 · AI-assisted audit

Considerably more is recoverable than assumed

Claim: Considerably more is recoverable than assumed

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The opposing possibility, argued in claims 52 to 55.

Claim 51 · checked 24 September 2026 · AI-assisted audit

Claim: Ancient DNA, lidar survey under forest canopy and imaging of damaged documents have each reached evidence that was inaccessible rather than absent.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

Each method is shown by one case: claims 53, 54 and 55, and claim 27.

Corrected

24 September 2026. Previously: “Ancient DNA, isotope analysis, lidar survey under forest canopy, and computational imaging of damaged documents have each opened access to evidence that was previously inaccessible rather than absent.” Three of the four methods were named with no source. Each now has one case from a cited study; isotope analysis, for which none was added, is dropped from the list.

Claim 52 · checked 24 September 2026 · AI-assisted audit

Claim: A genome sequenced from a finger bone in a Siberian cave identified the Denisovans, a group distinct from Neanderthals and modern humans.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

The same paper says the group shares a common origin with Neanderthals; distinct means a separate branch, not an unrelated one.

Later work looked for

Crossref, 2020 on, "Denisovan genome cranium identification": later work adds a high-coverage genome and ties the Harbin cranium to the Denisovans; it extends the identification rather than revising it.

Claim 53 · checked 24 September 2026 · AI-assisted audit

Claim: A lidar survey of 2,144 square kilometres of northern Guatemala revealed interconnected Maya settlement under the forest.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

Read only as the abstract.

Later work looked for

Crossref, 2019 on, "lidar Maya lowlands settlement survey": further lidar surveys across the Maya lowlands extend the finding; nothing that revises it.

Claim 54 · checked 24 September 2026 · AI-assisted audit

Claim: Near-infrared imaging recovers writing on the Dead Sea Scrolls that has faded to invisibility.

Kind
Observation. Something measured or seen, as the named source reports it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The Leon Levy Dead Sea Scrolls Digital LibraryAbout the Project: The Digital Library

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: The technology also helps recover traces of writing that have faded to invisibility over the years, with the help of near-infrared wavelengths.

Later work looked for

Crossref, 2018 on, "Dead Sea Scrolls multispectral imaging": nothing that changes it.

Claim 55 · checked 24 September 2026 · AI-assisted audit

Claim: The boundary between lost and unread has moved repeatedly, and there is no reason to assume it has stopped moving.

Kind
This page’s reading. A judgement the page makes from the evidence. Others read it differently.
Review
A judgement, not a fact. Reviewed for whether it is fairly put and follows from the checked claims. No source can confirm it.

The page’s reading of claims 27 and 53 to 55.

Claim 56 · checked 24 September 2026 · AI-assisted audit

What was read