Claim LD09-SL-C27 (v1.0)

Within six months of ChatGPT’s release, activity on Stack Overflow fell by 25% relative to Russian- and Chinese-language counterparts where access to ChatGPT was limited, an estimate the authors call a lower bound; votes on posts showed no large change in quality.

Provenance and status

Claim type: ESTIMATE (as printed: “ESTIMATE”)
Publication status: ELIGIBLE (QUALIFIED) (as printed: “ELIGIBLE WITH QUALIFIER”)
Verification state: CONTENT_VERIFIED_PRIMARY (ABSTRACT_ONLY) (as printed: “CONTENT VERIFIED ABSTRACT”; verified by: UNKNOWN)
Does not license: That questions moved elsewhere were lost, or anything after mid-2023
Source (field 6, as printed): del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024
Source type (field 7): PEER_REVIEWED_JOURNAL_ARTICLE (as printed: “Peer-reviewed journal article”)
Institutional position: Independent academic (European universities and research institutes; affiliations differ between the preprint and the journal version)
Maturity (claim evidence / publication maturity): RAPIDLY_MATURING (as printed: “RAPIDLY MATURING”)
Recorded date: 2026-10-15
Currentness / correction: This is the current version. No correction or concern relation is recorded on its Sources.

Version

Pinned version v1.0 (entry LD09-SL-C27--v1.0) — this page never floats to newer evidence.

This pinned version is also the current version.

Versions:v1.0 · current

Pinned Sources (field 6, version-specific)

“del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024” → SRC-SL-DEL-RIO-CHANONA-ET-AL-PNAS-NEXUS-2024--v1.0 — del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024; class PEER_REVIEWED_JOURNAL_ARTICLE (explicit public provenance pin)

All 25 canonical Claim fields (raw values and normalized values)

#	Canonical field	Canonical value (verbatim)	Normalized (Claim Value Vocabulary v1.0.2)
1	CLAIM ID	LD09-SL-C27	—
2	PUBLIC-FACING CLAIM	Within six months of ChatGPT’s release, activity on Stack Overflow fell by 25% relative to Russian- and Chinese-language counterparts where access to ChatGPT was limited, an estimate the authors call a lower bound; votes on posts showed no large change in quality.	—
3	CLAIM TYPE	ESTIMATE	base_types: ESTIMATE
4	RESEARCH STRAND	C — Systems, decisions and shared knowledge	—
5	MATURITY	RAPIDLY MATURING	states: RAPIDLY_MATURING
6	SOURCE	del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024	source_ids: SRC-SL-DEL-RIO-CHANONA-ET-AL-PNAS-NEXUS-2024
7	SOURCE TYPE	Peer-reviewed journal article	classes: PEER_REVIEWED_JOURNAL_ARTICLE
8	INSTITUTIONAL POSITION	Independent academic (European universities and research institutes; affiliations differ between the preprint and the journal version)	—
9	SCOPE	Public programming question-and-answer sites, to mid-2023	—
10	DESIGN	Difference-in-differences against platforms where ChatGPT access was restricted or weak	—
11	SAMPLE / DATASET	About 58 million posts	—
12	MODEL / TOOL / VERSION	ChatGPT (2022–2023)	—
13	COMPARATOR	Russian-language Stack Overflow, Segmentfault and mathematics Q&A sites	—
14	MAIN RESULT	A 25% fall within six months (journal abstract; the preprint’s average effect was about 16%); larger declines for the most popular programming languages; similar decreases for more and less experienced users (journal abstract); no large change in votes	—
15	INFERENTIAL TARGET	Whether chat assistants substitute for public knowledge sharing	—
16	DOES NOT LICENSE	That questions moved elsewhere were lost, or anything after mid-2023	—
17	VERIFICATION STATE	CONTENT VERIFIED ABSTRACT	state: CONTENT_VERIFIED_PRIMARY · qualifiers: ABSTRACT_ONLY · verified_by: UNKNOWN
18	LIMITATIONS	Journal version read in abstract, preprint in full; votes are a weak quality measure; control platforms not fully shielded	—
19	CONTRADICTORY / SUPPORTING SOURCES	Selective substitution and better questions: LD09-SL-C29; buffering in community forums: LD09-SL-C28	—
20	GEOGRAPHY / LANGUAGE	Global platform / English	—
21	DISTRIBUTIONAL LEDGER	Not recorded	—
22	R01 / FIELD-MAP LINKS	LD-09, D3	—
23	WHAT WOULD CHANGE THIS CLAIM?	Later data on whether activity stabilizes, and on what kinds of questions remain	—
24	PUBLICATION STATUS	ELIGIBLE WITH QUALIFIER	state: ELIGIBLE · qualifiers: QUALIFIED
25	RECORDED DATE	2026-10-15	—

Field 22 references resolved against Field Map v0.2: LD-09 (LIVING_DEBATE); D3 (DOMAIN)

Cited by Living Debate versions

LD-09 v0.1

Research-of-record provenance

Materialized by sociolens-materializer 0.6.0 at 2026-09-28T20:00:00.000Z; normalization contract SocioLens — Claim Value Vocabulary v1.0.2 — Pre-Spike Materialization Contract (v1.0.2). Content seal SHA-256 414455faa26798f316e7207c7ef75e8e79ff7d4a02f59e5e48c890a5c4ae299a.

Repository-authored inputs (not Drive exports)

SocioLens claim — LD09-SL-C27 v1.0 (v1.0) — written in the SocioLens repository by Project Lead (Claude, AI) on 2026-10-15; no Drive identity exists. Authority: AGENTS.md "Authority" (the Project Lead decides research content within the research-integrity rules) and the Owner's choice in the SocioLens project chat on 15 October 2026 to build the LD-09 debate; a new Claim, first version, written from the project's LD-09 source notes, checked against full texts or official abstracts. Block “ENTRY 27 — LD09-SL-C27” SHA-256 299f664cf45282ce63aefc84db2e09aeefc0b35a0015e31f4f6c6202a27133d4; fixture fixtures/authored/claims/LD09-SL-C27--v1.0.

Builder decisions (not Drive data)

VERSION = v1.0 — basis: Claim version taken from the repository-authored claim fixture version (SocioLens claim — LD09-SL-C27 v1.0); the first version of a new Claim of the LD-09 debate
CURRENT_POINTER = true — basis: repository-authored claim "SocioLens claim — LD09-SL-C27 v1.0" (Project Lead (Claude, AI), 2026-10-15); basis: AGENTS.md "Authority" (the Project Lead decides research content within the research-integrity rules) and the Owner's choice in the SocioLens project chat on 15 October 2026 to build the LD-09 debate; a new Claim, first version, written from the project's LD-09 source notes, checked against full texts or official abstracts
FIELD_6_SOURCE_REFERENCE = SRC-SL-DEL-RIO-CHANONA-ET-AL-PNAS-NEXUS-2024--v1.0 — basis: field 6 of ENTRY 27 — LD09-SL-C27 cites "del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024"; the only field-6 segment of this ClaimVersion's repository-authored ledger block.
SOURCE_PROVENANCE_PIN = SRC-SL-DEL-RIO-CHANONA-ET-AL-PNAS-NEXUS-2024--v1.0 — basis: explicit version-pinned public provenance of this ClaimVersion (Amendment v1.2 §6): the pinned field-6 Source record "del Rio-Chanona, Laurentsyeva & Wachs, “Large language models reduce public knowledge sharing on online Q&A platforms,” PNAS Nexus 3, pgae400, 2024".