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What is the expected population of China in 2050?

Lowconfidence— Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: the final assessment does not establish a complete supported answer for every requested part

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§ IIThe reading1 cited
Lowsource grounding— Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: the final assessment does not establish a complete supported answer for every requested partquick researchpreview plan 1/1 claimsSelected sources: 2/13 proposals

Recorded evidence

Targets with inspectable excerpts: 1/1.

Excerpt presence and estimated support do not establish a complete or factually correct answer.

Inspect targets and prepare a follow-up

  1. What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?

    Inspectable excerpts: 2 · 60% estimated

    Prepare follow-up: What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?

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> ⚠ Low confidence — Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: the final assessment does not establish a complete supported answer for every requested part. Treat this as provisional.

Model-written summary with sentence-level citations. Each sentence is followed by the verbatim source text it was checked against; sentences without a qualifying excerpt were removed.

Research target 1

Requested topic (unverified): “What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?”

The UN forecasts that China's population will decline to 1.313 billion by 2050. Source text: “The UN forecasts that China’s population will decline from 1.426 billion this year to 1.313 billion by 2050 and below 800 million by 2100.”

The 2050 figure reflects the UN's medium-variant, middle-of-the-road projection. Source text: “That’s according to the UN’s “medium variant,” or middle-of-the-road projection.”

Summary sentences are model-written and model-checked, not independently verified; they claim no more than their excerpts and are not a complete synthesis. Excerpts establish source grounding, not that a source is correct. Source statements may be wrong or conflicting. Payment states remain in the separate receipt.

Next steps to complete this research

These are suggested follow-up steps; this run has not performed them. They do not change the recorded evidence or payment state.

  • “World Population Prospects 2024: Summary of Results”: The document exceeded the read-size limit. Select a specific section or smaller publisher text/PDF edition of the same version; the whole document was not read.

Evidence ledger — recorded source excerpts

Research targets are unverified topics. Coverage is an estimate of excerpt support, not proof of entailment, factual truth or a complete answer.

  1. Requested topic (unverified): “What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?”

    60% estimated
    “The UN forecasts that China’s population will decline from 1.426 billion this year to 1.313 billion by 2050 and below 800 million by 2100.” [S1] Key facts about China’s declining population
    “That’s according to the UN’s “medium variant,” or middle-of-the-road projection.” [S1] Key facts about China’s declining population
What if a source were missing?

Temporarily leave out one source to see which research targets retain excerpts in this report.

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Local excerpt view

Showing the original excerpt ledger.

  1. What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?

    2 recorded excerpts remain.

    Original excerpts
    2
    Excerpts in this view
    2
    Inspect remaining excerpts

    “The UN forecasts that China’s population will decline from 1.426 billion this year to 1.313 billion by 2050 and below 800 million by 2100.”

    S1 · pewresearch.org · Key facts about China’s declining population · version 82ae77b0a109d36ca33f7e7de0a46b682a7c277daf2baab472ef83d7ee6f617c

    “That’s according to the UN’s “medium variant,” or middle-of-the-road projection.”

    S1 · pewresearch.org · Key facts about China’s declining population · version 82ae77b0a109d36ca33f7e7de0a46b682a7c277daf2baab472ef83d7ee6f617c

Research evidence matrix

Compare unverified research targets with cited sources and inspect recorded excerpts. An empty cell means no inspectable excerpt was recorded; it does not establish whether a claim is true, false, or disputed. Coverage and agent confidence do not prove entailment, measured accuracy or complete synthesis.

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  1. Research target (unverified)

    What is the projected population of China in 2050, and what range or uncertainty do major projections (e.g., UN World Population Prospects) give for that figure?

    Inspection status: Recorded excerpt

    Inspect cited sources

    [S1]

    Key facts about China’s declining population

    Publication: pewresearch.org

    Published: Not recorded

    Recorded version: 82ae77b0a109d36ca33f7e7de0a46b682a7c277daf2baab472ef83d7ee6f617c

    Recorded source identity

    Article URL: https://www.pewresearch.org/short-reads/2022/12/05/key-facts-about-chinas-declining-population/

    Inspect 2 excerpts
    The UN forecasts that China’s population will decline from 1.426 billion this year to 1.313 billion by 2050 and below 800 million by 2100.
    That’s according to the UN’s “medium variant,” or middle-of-the-road projection.

Reference export

1 article references. Recorded titles, links and dates; observed scholarly records also include supplied authors, DOI and journal metadata with read limits. Review metadata before using in a paper. Import RIS into Zotero with File → Import.

Cited sources and references

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Decision log · 140 steps
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  1. Decompose

    Breaking down: "What is the expected population of China in 2050?"

  2. Decompose

    Identified 1 research target(s) to investigate; these are not established facts

  3. Decompose

    Quick mode: at most 2 paid/cached/public reads, with no marketplace probe or gap-expansion round.

  4. Discover

    Article library searched across retained history: 21 matching article(s). Different articles from one publisher may support different research targets; preview matches alone are not evidence.

  5. Discover

    Web search: 2/2 planned queries attempted, 2 succeeded, 16 public page previews/leads, 0 unavailable queries. Previews and supplied URLs are discovery only. Public reads spend no USDC; model and service operating costs remain separate.

  6. Discover

    Discovered 3 verified creator candidate(s) from 2 publisher(s) and 111 free public reference candidate(s)

  7. Pre-check

    Claim-aware portfolio (exhaustive; bounded selection, not a claim of global optimality) selected 2/13 positive proposal(s): 2 free/cache selections + 0 paid fresh selections, predicting 1/1 claim(s) above the evidence floor with $0.000000/$0.025000 fetch USDC reserved.

  8. Pre-check

    Free-preview pre-check maps an actionable source to every sub-claim (1/1); paid reading may proceed within the budget.

  9. DecideCACHE
    World Population Prospects 2024: Summary of Results$0 · EV 90%

    Official UN World Population Prospects 2024 summary PDF, the primary source for China's 2050 projection and uncertainty ranges. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).

  10. DecideCACHE
    Key facts about China's declining population | Pew Research Center$0 · EV 85%

    Pew analysis directly cites UN medium-variant China 2050 figure (1.313B) and high-variant scenario, matching the projection/uncertainty target. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — selected for the claim-aware evidence portfolio (targets claim 1; 0 fetch USDC, 1 attention slot).

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    Wikimedia community story mentioning China but about cultural knowledge sharing, not population projections. - free public feed reference; no purchase or creator reward.

  104. DecideSKIP
    x402 - Linux Foundation Appoints Michael Hursta as Executive Director of the x402 Foundation$0 · EV 0%

    Payments foundation appointment; unrelated to demographics. - free public feed reference; no purchase or creator reward.

  105. DecideSKIP
    x402 - Introducing x402 V2: Evolving the Standard for Internet-native Payments$0 · EV 0%

    x402 protocol launch; unrelated to population projections. - free public feed reference; no purchase or creator reward.

  106. DecideSKIP
    Demographics of China - Wikipedia$0 · EV 60%

    Wikipedia demographics article likely includes 2050 projections and UN figures, though preview emphasizes aging and 2100. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  107. DecideSKIP
    China Population Pyramid 2050 | PopulationPyramid.net$0 · EV 80%

    PopulationPyramid.net page gives a specific China 2050 figure (~1.26B) from UN-based data, directly on target. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  108. DecideSKIP
    China's looming demographic challenge could up-end ...$0 · EV 55%

    News piece on China's demographic decline citing ~150M drop by 2050; relevant but less authoritative than UN/Pew. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  109. DecideSKIP
    World population projected to reach 9.8 billion in 2050, and 11.2 billion in 2100 | United Nations$0 · EV 60%

    UN DESA press release on world population projections; may include China 2050 figures, though older vintage. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  110. DecideSKIP
    China’s Aging Population and the Implications for China’s Security | RAND$0 · EV 65%

    RAND brief projects China losing ~250M by 2050 with a population chart, relevant to the 2050 figure and range. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  111. DecideSKIP
    Land system projections for China until 2050$0 · EV 50%

    Land-system paper includes population projection scenarios for China to 2050; secondary but offers alternative scenario figures. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  112. DecideSKIP
    China's population will continue to decline from its recent ...$0 · EV 15%

    Facebook post snippet repeats a 1.26B 2050 figure but is a low-quality social media source; better primary sources available. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

  113. DecideSKIP
    Population estimates and projections | DataBank$0 · EV 20%

    World Bank DataBank interface page; preview shows only UI metadata, unlikely to directly present China 2050 projection narrative. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

  114. DecideSKIP
    With these population projections won't China, Pakistan ...$0 · EV 5%

    Reddit discussion thread; not an authoritative projection source. - free public original-page READ selection (not a cache hit); no purchase or creator reward.

  115. DecideSKIP
    Human population projections$0 · EV 70%

    Wikipedia human population projections table lists China 2050 (~1.36B) alongside UN-based figures, directly relevant. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  116. DecideSKIP
    UNFPA China | Towards a resilient future for all: Achieving Agenda 2030 in the context of slowing population growth$0 · EV 60%

    UNFPA China page discusses China's population projections and UN global figures; free read may contain China-specific 2050 projection context for target 0. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  117. DecideSKIP
    New UN population projections: Where are we headed?$0 · EV 55%

    Population Connection piece on new UN projections covers China's trajectory; free read may include 2050 figures alongside the 2100 figure in the snippet. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  118. DecideSKIP
    5 Facts: How the World’s Population is Expected to Change by 2100 | The Pew Charitable Trusts$0 · EV 50%

    Pew facts on population to 2100 mention China's projected decline; free read may give 2050 China projections relevant to target 0. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  119. DecideSKIP
    Peak global population and other key findings from the 2024 UN World Population Prospects | Our World in Data$0 · EV 75%

    Our World in Data summary of 2024 UN World Population Prospects directly addresses China's population peak and projections, the most direct match for target 0's UN-based 2050 figure and uncertainty. - free public original-page READ selection (not a cache hit); no purchase or creator reward. — the claim-aware portfolio chose a stronger, less redundant set inside the 2-source attention and $0.025000 fetch-budget caps, so this proposal stays unspent.

  120. DecideSKIP
    Keryx owner release notes — first-party validation — Keryx v0.27.99$0.005 · EV 0%

    Keryx software release notes about client validation, unrelated to China population projections; not worth the $0.005 toll.

  121. DecideSKIP
    Keryx owner release notes — first-party validation — Keryx v0.27.68$0.005 · EV 0%

    Keryx release notes on dashboard/notify fixes, irrelevant to population projections; not worth the $0.005 toll.

  122. DecideSKIP
    Keryx Engineering (first-party) — Recovering a Keryx paid research job$0.002 · EV 0%

    Keryx engineering doc on buyer recovery workflow, unrelated to China 2050 population; cached but not useful for target 0.

  123. Fetch

    READ World Population Prospects 2024: Summary of Results - selected original public page, 0 USDC; not a cache hit.

  124. Fetch

    Public page unavailable (article-byte-limit); no evidence admitted. Continuing research.

  125. Fetch

    READ Key facts about China's declining population | Pew Research Center - selected original public page, 0 USDC; not a cache hit.

  126. Fetch

    Read extracted public text from https://www.pewresearch.org/short-reads/2022/12/05/key-facts-about-chinas-declining-population/ - S1; quote matching establishes source grounding, not fact verification.

  127. Sufficiency

    Sub-claim "What is the projected population of China in 2050, and what …": 60% covered by S1

  128. Sufficiency

    S1 directly states the UN medium-variant projection for China's 2050 population (1.313 billion), which answers the main figure. However, the sub-claim also asks for the range or uncertainty across major projections (e.g., UN variants or other major projection sources). The passage only gives the medium variant and notes it is the middle-of-the-road projection; it does not supply the high/low variant range or other major projections' figures. So the central figure is answered but the requested range/uncertainty component is missing. The assessment does not establish a complete supported answer for every requested part.

  129. Sufficiency

    Final check — "What is the projected population of China in 2050, and what …": 60% assessed by S1

  130. Sufficiency

    Final coverage assessment — S1 directly states the UN medium-variant projection for China's 2050 population (1.313 billion), which answers the main figure. However, the sub-claim also asks for the range or uncertainty across major projections (e.g., UN variants or other major projection sources). The passage only gives the medium variant and notes it is the middle-of-the-road projection; it does not supply the high/low variant range or other major projections' figures. So the central figure is answered but the requested range/uncertainty component is missing. The assessment does not establish a complete supported answer for every requested part.

  131. Synthesize

    Synthesizing a grounded answer from 1 source(s)…

  132. Evidence

    Relevance review returned; only checked excerpts can retain support, and review cannot raise it.

  133. Evidence

    Delivering 2 summary sentence(s), each tied to one checked verbatim excerpt; complete synthesis remains unverified.

  134. Evidence

    Source-matched public excerpt (no creator reward) — S1, research target 1, proposed support 90% (estimate, not entailment): “The UN forecasts that China’s population will decline from 1.426 billion this year to 1.313 billion by 2050 and below 800 million by 2100.”

  135. Evidence

    Source-matched public excerpt (no creator reward) — S1, research target 1, proposed support 60% (estimate, not entailment): “That’s according to the UN’s “medium variant,” or middle-of-the-road projection.”

  136. Synthesize

    Prepared a sentence-cited summary from 1 source(s)

  137. Verdict

    Confidence: Low — Each summary sentence is tied to a verbatim excerpt and model-checked; completeness and independent factual correctness remain unverified. Evidence assessment: the final assessment does not establish a complete supported answer for every requested part.

  138. Attribute

    pewresearch.org contributed 100% - free public reference; reward share withheld

  139. Settle

    Keryx operating fee withheld: reviewed authority, unclaimed-source proof or funding capacity is unavailable. The answer remains available.

  140. Done

    Done. Spent $0 across 0 confirmed/simulated payment(s) to creators.

Following latest steps

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Read checkpoints

Verify locally replays supported recorded query-local reserve, release, debit and hold decisions, attribution normalization and exact micro-USDC citation/author allocations. Model proposals and eligibility are asserted inputs. Query capacity is separate from signer exposure; verification does not establish funding, reward authority or settlement.

Economic families or records marked unavailable are not verified. Missing, fractional-micro or unsafe operands are never repaired; an empty family means no captured economic decision, not complete monetary coverage.

Query-local budget records
Recorded decisions can be replayed
Citation allocation records
Recorded decisions can be replayed
Author split records
Not captured

Model proposals and selected plan actions are recorded when available. Model generation is not replayed or expected to reproduce; verification checks only deterministic checkpoints.

Micro-USDC is shown only where the existing exact converter accepts the amount. Other monetary assertions are unavailable; numeric predicate replay preserves the recorded comparison.

Recorded checkpoint policy
ordinary-query-economics-v4
SHA-256 retained by this report
2f6750571cc61ccd6c26fef998d91e0d0d36e9aa0383d5ba7b76569604d5d0eb

Keep this digest separately from the downloaded sidecar. The offline audit command uses it as the expected digest.

Model proposal → selected plan → code checkpoint

BUY0
SKIP112
CACHE0
FREE2
ESCALATE0
UNKNOWN0

Latest terminal checkpoint outcome per recorded candidate; continuing checks and global stops are excluded. These are not settled purchases or quality scores.

Global stop checkpoints: 1 · Candidate rounds with continuing checks only: 0

CandidateRead roundModel proposedSelected planCheckpointCode resultReason / rule
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1070CACHECACHEduplicateCONTINUEduplicate
1070CACHECACHEpublic-routeFREEpublic-channel
960CACHECACHEduplicateCONTINUEduplicate
960CACHECACHEpublic-routeFREEpublic-channel
960CACHECACHEsufficiencyCONTINUEsufficiency
Run context0——expansionSTOPexpansion

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Portable research receipt

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