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Evidence record

How long have we been talking?

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: 13
  • Source checked: 35
  • Partly checked: 2
  • 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If something here is wrong, misquoted, out of date or unfair, write to support@unknownoceans.com and give the claim number, which does not change.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 past with no direct evidence: speech leaves nothing behind, so its date is argued from anatomy, genes and archaeology, and each line of evidence is disputed.

  • Language has an origin that can be dated

    Contested

    The recent account assumes a moment; the 2013 review argues for a slow accumulation over deep time, and a 2019 review dates speech-ready anatomy separately from language.

  • Neanderthals and modern humans are separate lineages that split several hundred thousand years ago

    Established

    The date is uncertain: the 2013 review gives at least 400,000 years, the 2018 paper cites at least about 600,000.

  • Bones and genes can stand in for speech

    Contested

    The review keeps some anatomical clues and discards others; a 2015 study contests that vertebrae say anything about language, and the review itself calls inferences from genes to speech tentative.

How the question is labelled

Claim: The oldest thing with no fossils

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 title. It rests on claims 8 and 9: speech itself leaves no trace, so its date has to be argued from other things. Whether language is older than other traits without fossils is not something any source measures; the title is a figure of speech.

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

Claim: First speech

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

The question

Claim: Speech leaves 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 9. The bones that frame the vocal tract do fossilise, which is why the page turns to them as proxies.

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

Claim: The date is argued from anatomy, from genes, from archaeology and from what Neanderthals could do.

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 4 · checked 24 September 2026 · AI-assisted audit

Claim: Estimates for the origin of language run from a sudden appearance fifty to a hundred thousand years ago to a capacity already in place half a million years ago.

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

These are the two positions the 2013 review sets against each other. Claim 7 reports a proposal that puts the speech apparatus far older still.

Corrected

24 September 2026. Previously: “Estimates for the origin of language range from a sudden appearance around fifty thousand years ago to a gradual development over half a million.” The review gives the recent estimates as 50,000 to 100,000 years, not about 50,000, and its older figure is when the capacity was already present, not how long it took to develop. "Range" implied these were the extremes; a 2019 review argues for a far older origin of speech, now added as claim 7.

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

Claim: A 2013 review argues from Neanderthal anatomy, genetics and behaviour that the capacity is much older than the recent estimates allow.

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 review arguing for one side. Its authors say the evidence is circumstantial and the terrain highly contested (claim 10).

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

Claim: A 2019 review of primate vocal anatomy goes further, putting what it calls the dawn of speech more than twenty million years back.

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 review is about the anatomy for making contrasting vowel-like sounds, which monkeys share; it does not date language, and says that element of speech was available to language whenever it later emerged.

Other readings

The 2013 review dates language rather than vocal anatomy, and places the capacity at about half a million years.

Corrected

24 September 2026. Previously: “” The summary gave half a million years as the far end of the estimates. A review that argues the vocal tract was speech-ready tens of millions of years ago is a real rival position on how long there has been speech, and the page now reports it.

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

Claim: Nothing about speech fossilises.

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 framing: sound and soft tissue leave nothing, and what remains are the bones and genes the next section lists.

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

Claim: No sound survives, and the soft tissue that makes it does not either.

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.

Why the position of the larynx and hyoid has to be inferred from the skull, as the review describes, rather than seen.

  • Supports

    On the antiquity of language: the reinterpretation of Neandertal linguistic capacities and its consequencessection "Speech and hearing", paragraph on the position of the hyoid

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

    The source reads: The position of the hyoid bone within the vocal tract has received a lot of attention since the proposal by Lieberman and Crelin (1971) that it can be inferred from features of the cranium (the styloid processes or basicranial angle)

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

Claim: So the question is answered by proxies, and the proxies disagree.

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 10 · checked 24 September 2026 · AI-assisted audit

What can be measured

Claim: What can be measured

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

What the proxies are

Claim: What the proxies are

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

Claim: The shape of the vocal tract, inferred from the base of the skull.

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

    On the antiquity of language: the reinterpretation of Neandertal linguistic capacities and its consequencessection "Speech and hearing", paragraph on the position of the hyoid

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

    The source reads: The position of the hyoid bone within the vocal tract has received a lot of attention since the proposal by Lieberman and Crelin (1971) that it can be inferred from features of the cranium (the styloid processes or basicranial angle)

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

Claim: The hyoid bone, and where it sat in the vocal tract.

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: “The hyoid bone, which anchors the tongue.” No cited source describes the hyoid’s function; the review discusses its shape and its position in the vocal tract, which are what the proxy is.

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

Claim: The size of the canal carrying nerves to the tongue and of the one carrying nerves to the muscles of breathing, which speech controls finely.

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 15 · checked 24 September 2026 · AI-assisted audit

Claim: Two of those do less work than they 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.

Summarises claim 17. Claim 22 reports that the third anatomical proxy, the breathing canal, is disputed as well.

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

Claim: The position of the larynx cannot be read reliably off the base of the skull, and the tongue canal overlaps in size with chimpanzees.

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.

The review reports the controversy as one over the descent of the larynx and the role of the hyoid, and concludes the hyoid’s position cannot be inferred from the skull.

Later work looked for

Europe PMC, 2013 on, "Neanderthal hyoid speech": a 2019 review (Boë and others) goes further, arguing laryngeal descent is not needed for vowel contrasts; nothing restores the skull base as a reliable guide.

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

Claim: And genetics: variants in genes involved in speech and language development, whose distribution across populations and across archaic humans can be dated.

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

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 871

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

    The source reads: population of constant size, the most likely date since the fixation of the beneficial allele is 0, with approximate 95% confidence intervals of 0 and 120,000 years ... the fixation occurred during the last 200,000 years of human history

  • Supports

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsResults, first paragraph; Introduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: 53 high-coverage genomes from global human populations sequenced as part of the Human Genome Diversity Panel (HGDP) ... a limited Sanger sequencing dataset of only three introns and a small sample of humans (n=20)

  • Supports

    On the antiquity of language: the reinterpretation of Neandertal linguistic capacities and its consequencessection "The emerging picture from ancient DNA"

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

    The source reads: they share for example the same “human specific” two amino-acid substitutions in FOXP2 (Krause et al., 2007)

What this does not establish

That a variant can be dated does not mean the date survives: claim 57 is an example.

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

The Neanderthal evidence points old

Claim: The Neanderthal evidence points old

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 review’s reading. Claim 22 reports a study that disputes one of its anatomical clues.

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

Claim: A 2013 review assembled the case that Neanderthals had the relevant anatomy, including a hyoid bone essentially like ours, the widened spinal canal the review ties to fine control of breathing, and the same variant of a gene implicated in speech that modern humans carry.

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

Shared FOXP2 protein changes; the review notes a regulatory element nearby differs between Neanderthals and modern humans.

Corrected

24 September 2026. Previously: “the widened spinal canal that fine control of breathing needs and Homo erectus lacks” The review’s comparison rests on one Homo erectus skeleton, and a 2015 study (claim 22) finds Homo erectus canals within the modern human range and contests the link to breathing control. The page stated both as fact; it now attributes the link to the review and reports the challenge.

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

Claim: The canal argument leans on one Homo erectus skeleton, from Nariokotome, whose canal is narrow.

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: “” Added with claim 22 to report the challenge to the canal argument.

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

Claim: A 2015 study found only three of its vertebrae constricted, which suggests a spinal disorder, placed the Homo erectus vertebrae from Dmanisi within the modern human range, and contested the idea that vertebrae say anything about breathing control or language.

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

    Spinal cord evolution in early Homoabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: we find all of the Dmanisi and most of the vertebrae of KNM-WT 15000 are within the human range of variation except for the C7, T2, and T3 of KNM-WT 15000, which are constricted, suggesting spinal stenosis

  • Supports

    Spinal cord evolution in early Homoabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: We contest the notion that vertebrae yield information about respiratory control or language evolution

  • Qualifies

    Spinal cord evolution in early Homoabstract

    Cited · Link answered, 19 October 2026 · Abstract only, 24 September 2026 · Artefacts and sites · Measurement

    The source reads: While additional fossils might definitively indicate whether H. erectus had evolved a human-like enlarged spinal canal

What this does not establish

Only the abstract was read. The authors say further fossils could settle whether Homo erectus had the enlarged canal.

Other readings

The 2013 review treats the thoracic canal as the crucial anatomical clue and reads the Nariokotome canal as primitive.

Corrected

24 September 2026. Previously: “” Currency search. A later study directly contradicts the claim the page made that Homo erectus lacked the enlarged canal, and disputes that the canal says anything about language.

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

Claim: They also hafted tools with pitch, used pigment, buried their dead and looked after the injured.

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 review summarises the archaeological literature rather than reporting new finds; care for the injured is inferred from healed injuries.

Later work looked for

Europe PMC, 2013 on, "Neanderthal birch tar hafting" and "Neanderthal symbolic behaviour pigment": later work (tar production, ochre adhesives, pigment use) adds to these behaviours; nothing found that withdraws them.

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

Claim: Those behaviours do not prove language.

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 the review’s own caution about reading language off the archaeological record.

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

Claim: The review argues they would not have been possible without it, and its authors call reading language off the archaeological record a controversial endeavour.

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: “and they are hard to explain without something like it.” The page stated the review’s own contested inference as a fact. It is now attributed, with the review’s own warning that such inferences are controversial.

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

Claim: If Neanderthals had language, the capacity predates the split between their lineage and ours, which puts its origin at least half a million years ago rather than in the last hundred thousand.

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 conditional: the page does not say Neanderthals had language. It follows the review in taking a capacity shared by both lineages to be inherited from their common ancestor. Estimates of the split vary: the review gives at least 400,000 years; the 2018 paper cites at least about 600,000.

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

Claim: Two timescales

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

Claim: Recent and sudden

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

Claim: Symbolic artefacts proliferate in Upper Palaeolithic Europe from about 40,000 years ago

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

A European pattern. The review reports earlier symbolic material too, including ochre-coloured shells at a Neanderthal site in Spain about 50,000 years old.

Later work looked for

Europe PMC, 2013 on, "Neanderthal symbolic behaviour pigment": later finds add earlier and Neanderthal symbolic material, which bears on the interpretation rather than on the European pattern.

Corrected

24 September 2026. Previously: “Symbolic artefacts become common only in the last 100,000 years” No cited source gave the 100,000 year figure. The review places the efflorescence the recent account rests on in Upper Palaeolithic Europe from about 40,000 years ago.

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

Claim: A single genetic change could have enabled modern syntax

Kind
Hypothesis. A proposed explanation, not an established one.
Review
Source checked. The cited passage was read, and it says this.

Other readings

The 2013 review rejects a single-mutation story; claim 50 gives its alternative.

Claim 30 · checked 24 September 2026 · AI-assisted audit

Claim: Explains why the archaeological record changes character when it does

Kind
Hypothesis. A proposed explanation, not an established one.
Review
Source checked. The cited passage was read, and it says this.

Other readings

The review says the idea of a sudden modern human revolution is now rejected by archaeologists, and explains the change by demography (claim 35).

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

Claim: Ancient and gradual

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

Claim: Neanderthal anatomy and genetics look adequate for speech

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

Claim 22 reports a challenge to one anatomical clue.

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

Claim: Complex behaviour long predates the symbolic explosion

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 34 · checked 24 September 2026 · AI-assisted audit

Claim: Treats the archaeological change as demographic rather than cognitive

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 35 · checked 24 September 2026 · AI-assisted audit

What is being argued

Claim: What is being argued

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

Claim: Half a syntax is not obviously useful, which is the problem every gradual account has to answer.

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 statement of the challenge, repeated in claim 42.

  • Qualifies

    The faculty of language: what's special about it?abstract

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

    The source reads: We contest related arguments that language is not an adaptation, namely that it is "perfect," non-redundant, unusable in any partial form, and badly designed for communication.

Other readings

Pinker and Jackendoff contest the argument that language is unusable in any partial form.

Corrected

24 September 2026. Previously: “Half a syntax is not obviously useful, which is the problem with every gradual account.” Proponents of gradual accounts argue partial language is usable; the line now states a challenge rather than a defect.

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

What counts as language

Claim: What counts as language

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

Claim: Other animals communicate by sound, and a few learn their calls.

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: “Vocal communication is widespread among animals.” The sentence was cited to sources that do not say it. The review does describe animal vocal communication and says vocal learning is rare among primates, which is what the page now says.

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

Claim: A 2002 paper by Hauser, Chomsky and Fitch proposes that the only uniquely human core of language is open-ended combination: a finite set of elements producing an unlimited range of expressions.

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.

What this does not establish

Only the abstract was read; the Science full text is paywalled. The paper calls the capacity recursion and states its uniquely human status as a hypothesis.

Corrected

24 September 2026. Previously: “What is distinctive about human language is open-ended combination: a finite vocabulary producing an unlimited number of meanings.” A contested hypothesis was stated as fact. It is now attributed to its authors, and worded as they word it (expressions from a finite set of elements).

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

Claim: Critics reply that this leaves out much of grammar that is not recursive, such as sound systems and word structure.

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 faculty of language: what's special about it?abstract

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

    The source reads: We find the hypothesis problematic. It ignores the many aspects of grammar that are not recursive, such as phonology, morphology, case, agreement, and many properties of words.

  • Supports

    The faculty of language: what's special about it?section 2.4, Phonology

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

    The source reads: So overall, major characteristics of phonology are specific to language (or to language and music), uniquely human, discretely infinite, and not recursive. Thus phonology represents a major counterexample to the recursion-only hypothesis.

  • Supports

    The faculty of language: what's special about it?section 2.7, Summary of evidence on the recursion-only hypothesis

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

    The source reads: Morphology: Not discussed by HCF.

What this does not establish

Their argument, not a settled result. In the body they treat phonology as the clear non-recursive case; for morphology their main complaint is that the 2002 paper does not discuss it.

Corrected

24 September 2026. Previously: “” The page reported the recursion hypothesis without its published rebuttal. Pinker and Jackendoff 2005 added as a source.

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

Claim: A gradual account has to describe what the intermediate stages were for, since half a syntax is not obviously useful.

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.

  • Qualifies

    The faculty of language: what's special about it?abstract

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

    The source reads: We contest related arguments that language is not an adaptation, namely that it is "perfect," non-redundant, unusable in any partial form, and badly designed for communication.

Other readings

Pinker and Jackendoff contest the argument that language is unusable in any partial form.

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

Claim: A sudden account has to explain how such a thing appears at once.

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 review makes the related point that a complex system is hard to evolve in a few thousand generations.

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

Claim: Neither has a settled answer.

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 44 · checked 24 September 2026 · AI-assisted audit

Why the genetics has cooled

Claim: Why the genetics has cooled

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 heading, summarising claims 46 to 50.

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

Claim: A gene once thought to hold a key to the rise of modern language

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: “A gene once described in the press as the language gene turned out to be” No cited source describes press coverage; the 2018 paper records the scientific speculation, and the page now says that. "Turned out" was dropped because the 2002 paper already identified FOXP2 as a transcription factor.

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

Claim: is a regulator of other genes, active in the brain, the lung and the gut, and involved in the fine motor control that speech needs.

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 2018 paper stresses that FOXP2 has an important role in language production; the point is that it is not specific to language.

Later work looked for

Europe PMC, 2018 on, FOXP2 in titles: work on its regulatory role and expression continues; nothing changes its description as a broadly expressed transcription factor.

Corrected

24 September 2026. Previously: “a regulator affecting many tissues, with effects on fine motor control generally.” "Fine motor control generally" is not what the sources say: the documented effect is on fine control of the mouth and face that speech needs. The tissues are now named as the 2018 paper names them.

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

Claim: Neanderthals carry the same variant.

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 protein-coding changes. The review notes a regulatory element in the gene differs.

Later work looked for

Europe PMC, 2018 on, "Neanderthal FOXP2": nothing found that revises the shared coding changes.

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

Claim: That is a useful case of a finding surviving while the story attached to it collapses.

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 52 to 57: the coding changes and the family remain; the recent-sweep dating did not survive.

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

Claim: The 2013 review pictures the biology of language as the slow adaptation of many factors, not a mutation in one or a few genes.

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: “and it is the reason current work talks about networks of genes and developmental timing rather than a switch.” No cited source says what current work as a whole does, or why. The sentence is narrowed to what the 2013 review says.

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

The gene that started that

Claim: The gene that started that

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

Claim: The 2002 paper that put a gene at the centre of this reported that the human version of FOXP2 differs from the chimpanzee version at two amino acid positions,

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

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 869

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

    The source reads: The chimpanzee, gorilla and rhesus macaque FOXP2 proteins are all identical to each other and carry only one difference from the mouse and two differences from the human protein

  • Supports

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 869

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

    The source reads: are a threonine-to-asparagine and an asparagine-to-serine change at positions 303 and 325, respectively

Later work looked for

Europe PMC, 2018 on: a 2023 study dissects the functions of the same two substitutions; the count stands.

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

Claim: and estimated that those changes spread through the human population within roughly the last two hundred thousand years.

Kind
What a model says. What a theory or model predicts or describes, which is not the same as what has been observed.
Review
Source checked. The cited passage was read, and it says this.

  • Supports

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 871

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

    The source reads: population of constant size, the most likely date since the fixation of the beneficial allele is 0, with approximate 95% confidence intervals of 0 and 120,000 years ... the fixation occurred during the last 200,000 years of human history

  • Context

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsResults, first paragraph; Introduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: 53 high-coverage genomes from global human populations sequenced as part of the Human Genome Diversity Panel (HGDP) ... a limited Sanger sequencing dataset of only three introns and a small sample of humans (n=20)

What this does not establish

A population-genetic estimate from 20 people. The point estimate was zero, with an interval of 0 to 120,000 years under constant population size; 200,000 is the paper’s bound once growth is allowed for. Claim 57 reports the re-analysis that found no sweep.

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

Claim: The gene was tied to speech through one family that carries a mutation in it, and through an unrelated person in whom it is disrupted.

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

    Molecular evolution of FOXP2, a gene involved in speech and languageabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Case report

    The source reads: A point mutation in FOXP2 co-segregates with a disorder in a family in which half of the members have severe articulation difficulties accompanied by linguistic and grammatical impairment

  • Supports

    Molecular evolution of FOXP2, a gene involved in speech and languageabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Case report

    The source reads: This gene is disrupted by translocation in an unrelated individual who has a similar disorder.

Later work looked for

How the gene was identified; a historical record that later work does not revise.

Corrected

24 September 2026. Previously: “The gene was found because a single extended family carries a mutation in it,” The 2002 paper gives two lines of evidence, the family and an unrelated individual with a translocation. The page credited the family alone.

24 September 2026. Previously: “The gene was tied to speech through one extended family that carries a mutation in it, and through an unrelated person in whom it is disrupted.” The paper describes a family in which half of the members are affected. It does not call it an extended family.

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

Claim: Those with the mutation have severe difficulties with articulation, with language and grammar, and with fine control of the mouth and face.

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

    Molecular evolution of FOXP2, a gene involved in speech and languageabstract

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Case report

    The source reads: A point mutation in FOXP2 co-segregates with a disorder in a family in which half of the members have severe articulation difficulties accompanied by linguistic and grammatical impairment

  • Supports

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 871

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Case report

    The source reads: a predominant feature of the phenotype of affected individuals is an impairment of selection and sequencing of fine orofacial movements

Later work looked for

Europe PMC, 2018 on, FOXP2 in titles: nothing that changes the description of the family’s disorder.

Corrected

24 September 2026. Previously: “and members with the mutation have severe difficulties with speech and with fine control of the mouth and face.” The paper describes linguistic and grammatical impairment as well as articulation difficulties; the page left out the language part.

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

Claim: The dating did not survive either.

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

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsConclusions

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: there is no evidence that the original two amino-acid substitutions were targeted by a recent sweep limited to modern humans <200 kya as suggested by Enard et al. (2002)

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

Claim: A 2018 re-analysis using a far larger and more diverse set of human genomes found no signal of a recent sweep at the locus, which removes the part of the 2002 result that put the change inside the window when anatomically modern humans appear.

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

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsSummary

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: We do not find evidence for recent positive or balancing selection at FOXP2. The original signal appears to have instead been due to sample composition.

  • Supports

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsResults, first paragraph; Introduction

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: 53 high-coverage genomes from global human populations sequenced as part of the Human Genome Diversity Panel (HGDP) ... a limited Sanger sequencing dataset of only three introns and a small sample of humans (n=20)

  • Supports

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsConclusions

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: there is no evidence that the original two amino-acid substitutions were targeted by a recent sweep limited to modern humans <200 kya as suggested by Enard et al. (2002)

  • Context

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 871

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

    The source reads: population of constant size, the most likely date since the fixation of the beneficial allele is 0, with approximate 95% confidence intervals of 0 and 120,000 years ... the fixation occurred during the last 200,000 years of human history

  • Context

    Molecular evolution of FOXP2, a gene involved in speech and languagep. 871

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

    The source reads: concomitant with or subsequent to the emergence of anatomically modern humans

  • Qualifies

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsConclusions

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: It is possible that these two substitutions were the targets of an ancient selective sweep, though an examination of ancient selection on this region did not reach significance here.

What this does not establish

The re-analysis does not rule out an older sweep before the split from Neanderthals; its test for one did not reach significance.

Later work looked for

Europe PMC, 2018 on, FOXP2 with selection or sweep: no published re-analysis found that restores a recent sweep; a 2026 study of language-candidate genes looks at older lineages and does not address it.

Corrected

24 September 2026. Previously: “inside the window where modern behaviour appears.” Enard and others tie the date to the emergence of anatomically modern humans, not of modern behaviour.

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

Claim: It is a real finding about a real gene.

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 2018 paper does not dispute FOXP2’s role in language production.

  • Qualifies

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsConclusions

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: We do not dispute the extensive functional evidence supporting FOXP2’s important role in the neurological processes related to language production

Claim 58 · checked 24 September 2026 · AI-assisted audit

Claim: What it is not is a switch for language,

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 47 and 55: a regulator active in many tissues, with effects that include motor control.

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

Claim: and the same variant turning up in Neanderthals means it cannot mark the arrival of language in our lineage alone.

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

    No Evidence for Recent Selection at FOXP2 among Diverse Human PopulationsIntroduction, second paragraph

    Cited · Link answered, 19 October 2026 · Read in full, 24 September 2026 · Research in people · Observational study: associations, not causes

    The source reads: ancient hominin genomes (Neanderthals and Denisovans) were found to also carry the substitutions, which is incompatible with a recent selective sweep specific to Homo sapiens

Corrected

24 September 2026. Previously: “and the same variant turning up in Neanderthals is the clearest reason why.” Sharing the variant with Neanderthals does not show a gene is not a switch; what it shows, as the 2018 paper says, is that a sweep specific to Homo sapiens is ruled out. The sentence now says that.

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

What was read