diff --git a/src/_data/research/source_supplements.yml b/src/_data/research/source_supplements.yml
deleted file mode 100644
index 3c5a3b5..0000000
--- a/src/_data/research/source_supplements.yml
+++ /dev/null
@@ -1,45 +0,0 @@
-- id: un-crpd-2014-legal-capacity
-  title: "General comment No. 1 (2014), Article 12: Equal recognition before the law"
-  authors: "UN Committee on the Rights of Persons with Disabilities"
-  year: 2014
-  publication: "CRPD/C/GC/1"
-  type: treaty-body general comment
-  url: "https://digitallibrary.un.org/record/812024"
-  reviewed_on: "2026-07-24"
-  relevance: "Clarifies that legal capacity and mental capacity are distinct and that disabled people have equal recognition before the law, with support for exercising legal capacity."
-  boundary: "Supports a legal-capacity safeguard against generalized competence tests; it does not prohibit task-specific qualifications for hazardous roles."
-
-- id: stephan-chenoweth-2008-civil-resistance
-  title: "Why Civil Resistance Works: The Strategic Logic of Nonviolent Conflict"
-  authors: "Maria J. Stephan; Erica Chenoweth"
-  year: 2008
-  publication: "International Security 33(1):7-44"
-  type: peer-reviewed empirical study
-  doi: "10.1162/isec.2008.33.1.7"
-  url: "https://doi.org/10.1162/isec.2008.33.1.7"
-  reviewed_on: "2026-07-24"
-  relevance: "Compares major nonviolent and violent resistance campaigns from 1900 to 2006 and argues that nonviolent campaigns often succeed by widening participation, legitimacy, and loyalty shifts."
-  boundary: "Challenges reduction of political power to violence; it does not prove violence is never decisive or remove the need for bounded emergency authority."
-
-- id: rosch-1975-semantic-categories
-  title: "Cognitive Representations of Semantic Categories"
-  authors: "Eleanor Rosch"
-  year: 1975
-  publication: "Journal of Experimental Psychology: General 104(3):192-233"
-  type: peer-reviewed empirical study
-  doi: "10.1037/0096-3445.104.3.192"
-  url: "https://doi.org/10.1037/0096-3445.104.3.192"
-  reviewed_on: "2026-07-24"
-  relevance: "Shows that many semantic categories have graded internal structure, with better and worse exemplars rather than only sharp boundaries."
-  boundary: "Challenges overconfident fixed definitions in ordinary language; it does not negate stipulated definitions for legal, technical, or safety-critical terms."
-
-- id: solove-2013-consent-dilemma
-  title: "Privacy Self-Management and the Consent Dilemma"
-  authors: "Daniel J. Solove"
-  year: 2013
-  publication: "Harvard Law Review 126:1880-1903"
-  type: peer-reviewed legal scholarship
-  url: "https://harvardlawreview.org/print/vol-126/introduction-privacy-self-management-and-the-consent-dilemma/"
-  reviewed_on: "2026-07-24"
-  relevance: "Argues that notice and consent are often insufficient for privacy self-management because data practices are too numerous, cumulative, and downstream to be individually managed well."
-  boundary: "Challenges consent as a complete legitimacy model in information privacy; it does not reject informed consent in medicine, research, sexuality, or other domains."
diff --git a/src/_data/research_data.js b/src/_data/research_data.js
index 8de217d..506ba9e 100644
--- a/src/_data/research_data.js
+++ b/src/_data/research_data.js
@@ -41,20 +41,10 @@ async function readYamlList(path) {
   return parsed;
 }
 
-async function readOptionalYamlList(path) {
-  try {
-    return await readYamlList(path);
-  } catch (error) {
-    if (error?.code === 'ENOENT') return [];
-    throw error;
-  }
-}
-
 export default async function researchData() {
-  const [sources, supplementalSources, claims] = await Promise.all([
+  const [sources, claims] = await Promise.all([
     readYamlList('src/_data/research/sources.yml'),
-    readOptionalYamlList('src/_data/research/source_supplements.yml'),
     readYamlList('src/_data/research/claims.yml')
   ]);
-  return { sources: [...sources, ...supplementalSources], claims };
+  return { sources, claims };
 }
diff --git a/tests/research-ledger.test.mjs b/tests/research-ledger.test.mjs
index a4d5da0..9c96c73 100644
--- a/tests/research-ledger.test.mjs
+++ b/tests/research-ledger.test.mjs
@@ -25,23 +25,12 @@ async function readYamlList(path) {
   return parsed;
 }
 
-async function readOptionalYamlList(path) {
-  try {
-    return await readYamlList(path);
-  } catch (error) {
-    if (error?.code === 'ENOENT') return [];
-    throw error;
-  }
-}
-
 test('research ledgers parse and claims resolve to reviewed sources', async () => {
-  const [baseSources, supplementalSources, claims, articleLab] = await Promise.all([
+  const [sources, claims, articleLab] = await Promise.all([
     readYamlList('src/_data/research/sources.yml'),
-    readOptionalYamlList('src/_data/research/source_supplements.yml'),
     readYamlList('src/_data/research/claims.yml'),
     readFile('src/_data/article_lab.json', 'utf8').then(JSON.parse)
   ]);
-  const sources = [...baseSources, ...supplementalSources];
   assert.ok(Array.isArray(sources) && sources.length > 0);
   assert.ok(Array.isArray(claims) && claims.length > 0);
   assert.ok(Array.isArray(articleLab) && articleLab.length === 8);