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Evidence record

What will be left of us?

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 24 September 2026.

  • A judgement, not a fact: 14
  • Source checked: 35
  • Partly checked: 1
  • Presented as open: 1

If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.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 question about the future that the page answers in two halves. What will physically remain is a question stratigraphers can address from how materials are made, buried and preserved; whether anything we mean will be understood is a design problem whose success nobody can test.

  • Human-made materials and chemical traces are entering the geological record

    Established

    Manufactured materials, fallout radionuclides, combustion particles and altered carbon and nitrogen isotope ratios are all found in recent sediments or ice. Whether they justify a formal new epoch is a separate question the page does not raise.

  • A message can be designed to outlast the language it is written in

    Open

    The WIPP panel believed a marker system could be designed to persist and communicate far into ten thousand years, and said it needed further study before it was built. No such system has been tested over that span, because none could be.

  • Someone will come to read what is left

    Open

    The page says this is unknown, and ends on it.

How the question is labelled

Claim: The layer we are making

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 title. It follows from claims 3, 5 and 27: manufactured materials and chemical traces are entering sediments and ice now.

Claim 1 · checked 24 September 2026 · AI-assisted audit

Claim: What remains

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

The question

Claim: Concrete, aluminium and plastic are entering the rock record

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 Anthropocene is functionally and stratigraphically distinct from the Holoceneabstract

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Manufactured materials in sediments, including aluminum, plastics and concrete, coincide with global spikes in fallout radionuclides and fossil-fuel combustion particulates.

What this does not establish

They are entering sediments now. Whether a given object becomes rock depends on burial and later history, as claim 9 says.

Later work looked for

Crossref, 2019 on, "Anthropocene golden spike candidate sites": the 2023 candidate-site papers in The Anthropocene Review report the same classes of marker; nothing that changes it.

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

Claim: The harder problem is leaving a message that outlasts the language it is written in

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 framing of its second half. It follows from the marker panel’s account of the problem, claims 35 to 45.

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

Claim: Human-made materials are being buried in enough quantity that some will fossilise, and with the chemical traces of the last century they make a layer distinct from what lies beneath it

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: The long-term preservation of technofossils therefore requires burial ... many are buried actively today, for instance in landfills ... Technofossils, particularly from their expansion in production of the last few decades, are unlikely to be rare.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the Holoceneabstract

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Human activity is leaving a pervasive and persistent signature ... Manufactured materials in sediments ... coincide with global spikes in fallout radionuclides and fossil-fuel combustion particulates. Carbon, nitrogen and phosphorus cycles have been significantly modified over the last century. ... The combined signals render the Anthropocene stratigraphically distinct from the Holocene.

What this does not establish

Both papers are by members of the Anthropocene Working Group. The distinctness of the layer is their finding; whether it should be named as an epoch is a different question.

Corrected

24 September 2026. Previously: “Human-made materials are being buried and will fossilise, producing a distinctive layer readable far into the future.” The technofossil paper says preservation needs burial and that much degrades, not that the materials will fossilise as a class. The distinct layer in Waters and others is made by materials and chemical signals together.

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

Claim: Deliberate communication is much harder

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, drawn from the marker panel’s account in claims 35 to 45.

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

Claim: The panel that designed markers for a nuclear waste site planned for languages and institutions that might not last ten thousand years, gave its markers a better than even chance of still standing in most of its estimates, and said a system that both survives and stays readable needs further study before it is built

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

The estimates are expert judgement, not measurement, and each is conditional on how technologically advanced the future society is.

Corrected

24 September 2026. Previously: “Deliberate communication is much harder: the panel that designed markers for a nuclear waste site began from the assumption that no language, symbol or institution can be relied on for ten thousand years, and ended by saying the problem needs more study before anyone builds anything.” Neither team assumed that no language or symbol could be relied on: one designed for a disruption that might affect languages and institutions, and the other assumed scholarship able to translate the messages would survive. The panel’s own conclusion was that a marker system can be designed to persist and communicate, with further study first.

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

Claim: Everything made is a potential fossil

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 own opening line; the technofossil paper treats every preservable artefact as a potential part of the record.

  • Context

    The technofossil record of humansForm

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

    The source reads: all that are preservable over geological time-scales will contribute to the ‘far-future’ signal of the Anthropocene.

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

Claim: Left at the surface it degrades and erodes; what lasts is what gets buried, in the right conditions

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: At the surface, technofossils will degrade physically and chemically over time, particularly as the deposits that they lie on or that enclose them undergo erosion. The long-term preservation of technofossils therefore requires burial. In detail, it reflects the conditions of that burial

Corrected

24 September 2026. Previously: “Most of it will be crushed, dissolved or eroded, and some proportion will be buried in the right conditions and preserved.” The paper does not say what share will be destroyed, so "most of it" was more than it carries. It says surface material degrades and that long-term preservation requires burial.

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

Claim: That happens whether or not anyone intends 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.

Follows from claim 9: burial and preservation are geological processes.

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

Claim: Intending it turns out to be the difficult part

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 summary of its second half, claims 32 to 53.

Claim 11 · checked 24 September 2026 · AI-assisted audit

The record being made

Claim: The record being made

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

The accidental record

Claim: The accidental record

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

Claim: A 2014 paper set out the concept of technofossils: manufactured objects entering the sedimentary record

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.

  • Supports

    The technofossil record of humansabstract; Introduction

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

    The source reads: technofossils - the preservable material remains of the technosphere ... Hence, we distinguish them here as technofossils

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

Claim: Many are made of materials very rare in nature (uncombined iron, aluminium, titanium) or unknown in it (uncombined vanadium and molybdenum, boron nitride, artificial glasses, plastics)

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.

  • Supports

    The technofossil record of humansComposition

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

    The source reads: Humans, by contrast, produce artefacts from materials that are either very rare in nature (uncombined iron, aluminium and titanium) or unknown naturally (uncombined vanadium, molybdenum). There is a wide variety of novel minerals such as boron nitride, tungsten carbide and, and ‘mineraloids’ such as artificial glasses and plastics

What this does not establish

The paper lists boron nitride among novel minerals and glasses and plastics as novel mineraloids; the page groups them with the metals unknown in nature.

Corrected

24 September 2026. Previously: “They are made of materials with no natural precedent, either very rare in nature” A material that is rare in nature has a natural precedent, and not every technofossil is made of novel material. The paper says humans produce artefacts from such materials, not that all are.

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

Claim: Since the Second World War they have spread over every continent and into the sea

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: post-WWII times have seen the spread of, to take just a few out of many examples, paper-clips, aluminium cans, ball-point pens and plastic bags over every continent, and spilling over into the marine realm.

Corrected

24 September 2026. Previously: “They reach every continent in a geologically instantaneous interval” The paper dates the global spread to after the Second World War and names the sea; "geologically instantaneous" was the page’s gloss, and the date is more useful to a reader.

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

Claim: and their range of forms, the paper says, rivals biological diversity

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.

  • Supports

    The technofossil record of humansTechnofossil nomenclature

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

    The source reads: In detail, thousands of different types of toothbrushes have been produced. The range of diversity rivals biological diversity

What this does not establish

A comparison the authors draw, not a count.

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

Claim: Durability is not uniform. Concrete and brick can degrade in sulphate-rich or chloride-rich groundwater, iron corrodes, plastics break down in light and heat

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: Seemingly robust materials such as bricks or concrete may degrade in the presence of water, temperature fluctuations and sulphate- or chloride-rich groundwaters, iron-based metals can corrode in the presence of oxygen and chloride ions, and plastics degrade in the presence of light, oxygen, heat or corrosive fluids

Corrected

24 September 2026. Previously: “Concrete and brick degrade in sulphate-rich or chloride-rich groundwater” The paper says they may degrade under those conditions, not that they do.

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

Claim: What keeps the record thick is volume and poor recycling

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: The abundance of technofossils reflects great current differences between the technosphere and biosphere as regards recycling of its component matter.

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

Claim: roughly half of aluminium is recycled, under a fifth of plastics, under a tenth of concrete

Kind
Present-day figure. A count, survey or report finding, as the named source gives it.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: In the contemporary technosphere, by contrast, recycling rates are much lower (e.g. ~50% for aluminium, <20% for plastics, <10% for concrete).

What this does not establish

The paper gives these as rough figures without a year or a source of its own; they describe the early 2010s.

Later work looked for

Europe PMC, Geyer, Jambeck and Law 2017 on all plastics ever made: about 9 per cent of plastic waste had been recycled by 2015, inside "under a fifth". Aluminium and concrete rates were not searched further.

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

Claim: and much of what escapes is hard for scavengers and microbes to digest

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.

  • Supports

    The technofossil record of humansDistribution and preservation

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

    The source reads: Much, though, is poorly digestible for scavenging metazoa and microbes (e.g. plastics, metals – even wood is commonly seasoned or varnished to resist decay).

Corrected

24 September 2026. Previously: “and most of what escapes is indigestible to the things that eat dead matter” The paper says "much" and "poorly digestible", not "most" and "indigestible".

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

Claim: Landfills hold the densest concentrations

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.

  • Supports

    The technofossil record of humansComposition

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

    The source reads: The distribution of these materials is patchy, with densest concentrations in landfill sites and recycling and combustion plants.

What this does not establish

The paper says this of plastics and aluminium, and names recycling and combustion plants alongside landfills.

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

Claim: The strangest entry is downward

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, introducing claim 24.

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

Claim: Mine workings reach hundreds of metres into the ground and boreholes several thousand

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 technofossil record of humansDistribution and preservation

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: mining activities commonly reach hundreds of metres into the ground, and drilling operations penetrate to several thousands of metres.

Later work looked for

Not searched: the claim gives orders of magnitude for mining and drilling depth, which later work would not narrow.

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

Claim: and the paper gives those traces extremely high preservation potential, until the rock they cut is eroded or metamorphosed

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.

  • Supports

    The technofossil record of humansDistribution and preservation

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Earth and its record · Review of the field

    The source reads: the deep crustal traces have extremely high preservation potential (until the rocks affected are carried to the surface and eroded ... so that borehole traces, for example, are obliterated by high-grade metamorphism).

Claim 25 · checked 24 September 2026 · AI-assisted audit

And the chemical one

Claim: And the chemical one

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

Claim: Fallout from atmospheric nuclear testing, fly ash, nitrogen isotope ratios altered by fertiliser and fuel burning, and the carbon isotope signature of burned fossil fuel are all recorded in sediments or ice, most of them worldwide

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 Anthropocene is functionally and stratigraphically distinct from the HoloceneRadiogenic signatures in contemporary sediments and ice

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Fallout from thermonuclear weapons tests that began in 1952 C.E. and peaked in 1961−1962 C.E. left a clear global signature

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneAnthropogenic materials

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: Fossil fuel combustion disseminates unburnt particles as black carbon (BC), Inorganic Ash Spheres (IAS) and Spherical Carbonaceous Particles (SCPs). ... SCPs ... show near-synchronous global increase around 1950 C.E. ... BC, IAS and SCPs, being airborne particulates, leave a permanent marker within both sediments and glacial ice.

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneChanged geochemical signatures in contemporary sediments and ice

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: notably the use of the Haber process from 1913 C.E., have increased the amount of reactive nitrogen (Nr) ... with also increased nitrogen oxides (NOx) flux sourced from combustion of fossil fuels ... Northern Hemisphere lakes show increasingly negative δ15N values ... In Greenland ice, declining δ15N values start

  • Supports

    The Anthropocene is functionally and stratigraphically distinct from the HoloceneCarbon cycle evidence from ice core

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Earth and its record · Review of the field

    The source reads: This coincides with a steep fall of >2 per mil to -8.5 δ13C for atmospheric CO2 (65; Fig. 5C), due to an increase in 12C from burning fossil hydrocarbons.

What this does not establish

The nitrogen isotope record in the paper is from Northern Hemisphere lakes and Greenland ice, not worldwide; the fallout signal is global but strongest in the mid-latitudes and the Northern Hemisphere.

Later work looked for

Crossref, 2019 on, "Anthropocene golden spike candidate sites": the 2023 candidate-site papers use plutonium fallout, fly ash and carbon isotopes as markers; the 2024 vote against a formal Anthropocene epoch, recorded in the Anthropocene register, concerned the unit and not these signals.

Corrected

24 September 2026. Previously: “altered nitrogen isotope ratios from industrial fertiliser, and the carbon isotope signature of burned fossil fuel are all recorded in sediments and ice worldwide.” Waters and others attribute the extra reactive nitrogen to fertiliser manufacture and to nitrogen oxides from burning fossil fuel, and report the nitrogen isotope shift from Northern Hemisphere lakes and Greenland ice only.

Claim 27 · checked 24 September 2026 · AI-assisted audit

Claim: Nothing in that has to be decoded

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 point is that these signals take no reader who understands human symbols. They do take instruments and interpretation to measure.

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

Claim: It is the part of our record that does not depend on anyone understanding us

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 27, set against the deliberate messages that follow.

Claim 29 · checked 24 September 2026 · AI-assisted audit

The record being attempted

Claim: The record being attempted

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

Whether a message can be left

Claim: Whether a message can be left

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

Claim: Sandia National Laboratories convened an expert panel in the early 1990s to work out how to mark a nuclear waste repository in New Mexico so that people would stay away for ten thousand years, which is the period the regulation covers

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.

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

Claim: Engineers, archaeologists, anthropologists, linguists, astronomers and designers sat on it

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

Table 2-1 lists thirteen members; the engineering was environmental engineering and materials science, and the panel also included geomorphology, semiotics and scientific illustration.

Claim 33 · checked 24 September 2026 · AI-assisted audit

Claim: The pessimism is in the assumptions rather than the conclusions

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. It follows from claims 35 and 42: one team designed for a disrupted future, and the panel concluded a marker system could be built.

Other readings

The other team’s assumptions were less pessimistic: it assumed scholarship able to translate the messages would survive somewhere, as claim 36 says.

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

Claim: One of the two teams assumed that political change would take the area out of United States control and that vandalism would continue, and designed for a break in society that might disrupt languages and institutional memory

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

    Expert judgment on markers to deter inadvertent human intrusion into the Waste Isolation Pilot Plantsection 3.2.2 (Team B)

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

    The source reads: political change will take place (i.e., resulting in the United States of America not being in control of the area around the repository). ... A third assumption made by Team B was that vandalism will continue

  • Supports

    Expert judgment on markers to deter inadvertent human intrusion into the Waste Isolation Pilot Plantsection 3.2.2 (Team B)

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

    The source reads: what the Washington A Team of the Futures Panel called "radical discontinuity." Under radical discontinuity, society would have gone through considerable changes--political, social, and technological--that might impact existing knowledge bases, languages, and institutional controls and memory.

Corrected

24 September 2026. Previously: “One of the two teams took it as given that political change would remove the United States from control of the area, that languages and institutional memory would be disrupted, and that vandalism would continue.” Political change and vandalism were Team B’s stated assumptions. The disruption of languages and memory was a scenario it designed for, in words that say it "might" happen, not something it took as given.

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

Claim: The other trusted writing more than pictures

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: “Meaning does not hold either:” The cave-painting point is Team A’s, made to explain why it put less weight on pictographs and more on written language. The page had stated it as a general truth.

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

Claim: you can recognise the people and animals in a cave painting, it noted, without knowing what the painter meant by them

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.

  • Supports

    Expert judgment on markers to deter inadvertent human intrusion into the Waste Isolation Pilot Plantsection 3.1.3 (Team A)

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

    The source reads: Team members thought that while human figures and animals would be recognized in the future, the intent of the messages might be lost. For example, one can recognize people and animals in ancient cave drawings but not know what the artists were trying to communicate about them.

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

Claim: So the design is redundant on purpose

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.

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

Claim: Earthen berms made jagged to read as foreboding rather than honorific

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

This and the next claim describe Team A’s design; Team B’s differed in detail.

Claim 39 · checked 24 September 2026 · AI-assisted audit

Claim: Warnings at four levels of complexity, from the shape of the place to a technical account buried in rooms under the earthworks, in about seven languages, with wall space left blank for a future generation to add its own

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

Team A defined a fifth level, the complete rulemaking record, to be kept in archives rather than at the site.

Corrected

24 September 2026. Previously: “to a technical account sealed in chambers, in seven languages,” The report places the Level IV rooms inside the corner berms, built to be entered but not emptied, and says "approximately seven languages".

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

Claim: Materials chosen to have little salvage value

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.

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

Claim: The panel did not conclude that this is impossible

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.

  • Supports

    Expert judgment on markers to deter inadvertent human intrusion into the Waste Isolation Pilot Plantsection 5.3

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

    The source reads: The estimates provided by the panel members show their belief that a marker system can be designed and constructed to persist and to communicate the location and dangers of the wastes buried in the repository far into the 10,000 year period of regulatory concern.

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

Claim: Its members put the chance of the markers still standing after ten thousand years at 40 to 85 per cent, most estimates between 60 and 70

Kind
Present-day figure. A count, survey or report finding, as the named source gives it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

Expert judgement elicited in 1992, each estimate conditional on whether the dominant technology is higher, equal to or lower than today’s. The lowest, 40 per cent, is Team B’s for a society with less technology.

Later work looked for

Crossref, 2000 on, "WIPP permanent markers human intrusion": a DOE Permanent Markers Implementation Plan (2004) commits to testing and a final design before disposal ends; no later persistence estimates were found.

Corrected

24 September 2026. Previously: “It put the chance of the markers still standing in recognisable form after ten thousand years” The estimates are the members’ individual and team judgements, not a single figure from the panel; "recognisable form" is the report’s wording for the 500-year estimate.

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

Claim: The chance that a surviving message is read correctly fell over time too, most for a society with less technology than ours

Kind
Present-day figure. A count, survey or report finding, as the named source gives it.
Review
Source checked. The cited passage was read, and it says this.

What this does not establish

The interpretation estimates are conditional on the markers surviving, and vary with who intrudes and why; at ten thousand years they run from near zero to 99 per cent across experts and cases.

Later work looked for

Crossref, 2000 on, "WIPP permanent markers human intrusion": no later estimates of interpretability found.

Corrected

24 September 2026. Previously: “with the chance of correct interpretation falling faster than that” The report does not compare the two rates. It says interpretation probabilities fall with time, especially for a low-technology society, and they are conditional on the markers existing.

Claim 44 · checked 24 September 2026 · AI-assisted audit

Claim: The report says a system that both survives and stays interpretable for that long needs further study before anyone builds it

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.

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

Claim: Ten thousand years is about twice the span of recorded history

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 Origins of Writingessay, paragraphs on proto-cuneiform and the rebus principle

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

    The source reads: Only a few examples of its use exist in the earliest stages of cuneiform from between 3200 and 3000 B.C.

What this does not establish

Writing began in Mesopotamia at the end of the fourth millennium BC, about 5,000 years ago. Team A of the panel put literacy at 6,000 years, which would make the ratio nearer 1.7.

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

What digital records leave

Claim: What digital records leave

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

Claim: Most of the world's capacity to store information has been digital since the early 2000s: 94 per cent of it by 2007

Kind
Present-day figure. A count, survey or report finding, as the named source gives it.
Review
Partly checked. Only part of the source could be read. What was not read is listed.

What this does not establish

The paper was read only as its abstract. The figure is for storage capacity on 60 analog and digital technologies, optimally compressed, from 1986 to 2007.

Later work looked for

Crossref, 2012 on, "world information storage capacity digital": no comparable later estimate found; the digital share can only have grown since 2007.

Corrected

24 September 2026. Previously: “Most of the world's stored information has been digital” Hilbert and López measured technological storage capacity, not all stored information.

Claim 48 · checked 24 September 2026 · AI-assisted audit

Claim: That storage depends on media, hardware and software that keep changing

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.

  • Supports

    Avoiding Technological Quicksand: Finding a Viable Technical Foundation for Digital Preservationsection 1

    Cited · Link answered, 19 October 2026 · The cited passage was read, 24 September 2026 · Artefacts and sites · Review of the field

    The source reads: Not only are digital documents vulnerable to loss via media decay and obsolescence, but they become equally inaccessible and unreadable if the software needed to interpret them ... or the hardware on which that software runs ... is lost or becomes obsolete

Corrected

24 September 2026. Previously: “That storage depends on hardware, formats and power.” Rothenberg, the passage’s source, names media, hardware and software; power is not in it.

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

Claim: None of it lasts unless it is copied to new media every few years

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

Rothenberg adds that copying preserves the bits, not the ability to read them (claim 51).

Corrected

24 September 2026. Previously: “None of it lasts centuries without continuous copying.” Rothenberg gives the cycle as every few years; the page now says what he says.

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

Claim: Storage media have short physical lifetimes and shorter market lifetimes, and the software needed to interpret a file goes obsolete as fast as the medium it sits on

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.

Corrected

24 September 2026. Previously: “goes obsolete faster than the medium it sits on” Rothenberg says "just as fast", not faster.

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

Claim: Rothenberg put it plainly in 1999: there is as yet no viable long-term strategy to ensure that digital information will be readable in the future

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

A 1999 judgement. Rothenberg himself argued in the same report that emulation offered a solution, still to be proved.

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

Claim: A civilisation that wrote more than any before it may leave a thinner readable record than one that used clay

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 draws from claims 48 to 52, stated as "may". About 6,000 proto-cuneiform tablets survive from the Uruk culture alone.

  • Context

    The Origins of Writingessay

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

    The source reads: Clay became the preferred medium for recording bureaucratic items as it was abundant, cheap, and durable in comparison to other mediums.

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

The reader

Claim: The reader

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

Claim: Twice the span of recorded history, used as a design requirement

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

As claim 46: about twice on the usual dating of writing, nearer 1.7 on Team A’s.

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

Who would read it

Claim: Who would read it

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

Claim: A long message assumes a reader with curiosity, tools and a reason to look

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 generalisation. The marker panel modelled exactly this: whether a message is read depends on who comes, why, and with what technology.

Corrected

24 September 2026. Previously: “Every plan for a long message assumes a reader with curiosity, tools and a reason to look” “Every plan” is a universal no source here surveys; the one plan the page has read, the marker panel’s, is what the sentence rests on. The point needs no count.

Claim 57 · checked 24 September 2026 · AI-assisted audit

Claim: Those are assumptions about a future nobody can constrain

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 58 · checked 24 September 2026 · AI-assisted audit

Claim: The accidental record has no such requirement

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 27 to 29.

Claim 59 · checked 24 September 2026 · AI-assisted audit

Claim: What is buried will be there, in the rock, whether or not anything comes to look at 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.

The page’s closing line. Burial is what preserves (claim 9), and erosion or metamorphism can still remove it (claim 25).

Corrected

24 September 2026. Previously: “It will be there, in the rock, whether or not anything comes to look at it.” The page’s own first section says much of the record degrades; what persists is what is buried.

Claim 60 · checked 24 September 2026 · AI-assisted audit

What was read

  • The technofossil record of humansZalasiewicz and others, The Anthropocene Review · Authors’ manuscript, “Zalasiewicz et al technofossils ms all.pdf”, University of Leicester repository via figshare 10127450Read in full, 24 September 2026 · Copyright; quoted brieflyThe published version in The Anthropocene Review was not read; the manuscript was read in full.
  • The Anthropocene is functionally and stratigraphically distinct from the HoloceneWaters and others, Science · Authors’ submitted manuscript of 17 August 2015, the same copy read for the Anthropocene registerThe cited passage was read, 24 September 2026 · Copyright; quoted brieflyRead: abstract, the sections on new materials, geochemical signatures, radiogenic signatures and the carbon cycle. The published version in Science was not read.
  • Expert judgment on markers to deter inadvertent human intrusion into the Waste Isolation Pilot PlantSandia National Laboratories, US Department of Energy · SAND92-1382, printed November 1993, OSTI scanned PDF (349 pages)The cited passage was read, 24 September 2026 · US government-sponsored report; quoted brieflyRead: abstract, chapter 1, section 2.2, sections 3.1 and 3.2, chapter 5, and passages of Appendices F and G. The rest of the team reports in the appendices was not read.
  • The Origins of WritingIra Spar, The Metropolitan Museum of Art, Heilbrunn Timeline of Art History · Heilbrunn Timeline of Art History essay, October 2004, read from the Wayback Machine copy of December 2024 because the live page refused automated requestsRead in full, 24 September 2026 · Copyright; quoted briefly
  • The World's Technological Capacity to Store, Communicate, and Compute InformationHilbert and Lopez, Science · Europe PMC abstract, PMID 21310967Abstract only, 24 September 2026 · Copyright; quoted brieflyPaywalled; the paper and its supporting material were not read.
  • Avoiding Technological Quicksand: Finding a Viable Technical Foundation for Digital PreservationRothenberg, Council on Library and Information Resources · CLIR report 77, January 1999, PDF from clir.orgThe cited passage was read, 24 September 2026 · Copyright; quoted brieflyRead: the executive summary, sections 1, 2 and 5. The later sections, which argue for emulation, were not read.