The Credibility Tier System

Every source you encounter in research carries an implicit credibility rating. The problem is that most researchers never make that rating explicit. They absorb information from SEC filings and Twitter threads with the same level of trust, process it with the same analytical weight, and build conclusions on a foundation that mixes bedrock with sand. The credibility tier system forces you to classify every source before you incorporate its claims into your analysis.

Tier A sources carry legal or regulatory accountability for accuracy. SEC filings, patent applications, court documents, audited financial statements. If the information is wrong, someone faces legal consequences. That accountability is the strongest reliability signal available. Tier B sources have professional reputation at stake. Peer-reviewed research, analyst reports from major firms, official company statements attributed to named executives. Inaccuracy damages careers and institutional credibility. Tier C sources have editorial oversight but limited accountability. Established journalism, industry publications, conference presentations. Quality varies by outlet but there is a review process. Tier D sources have no accountability mechanism. Blog posts, social media, anonymous forums, unattributed claims. Useful for hypothesis generation but never for conclusion support.

1. Tier A: Legally Accountable SEC filings, patent applications, court documents, audited financials, regulatory submissions. Information here is produced under penalty of law. Treat as highest credibility. Verify the filing is current and authentic, then trust the data.
2. Tier B: Professionally Accountable Named executive statements, analyst reports from established firms, peer-reviewed research, official press releases with attribution. Professional reputation constrains inaccuracy. Strong but verify against Tier A when possible.
3. Tier C: Editorially Reviewed Major journalism outlets, industry trade publications, conference keynotes and presentations, authored white papers. Editorial process exists but accountability is indirect. Useful for context and narrative, but cross-reference before building conclusions.
4. Tier D: Unaccountable Anonymous posts, unattributed claims, social media commentary, blog posts without sourcing, rumor and speculation. Valuable for hypothesis generation and sentiment reading. Never cite as evidence for a conclusion without corroboration from a higher tier.