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Forensic epistemology

The Perfectly Corroborated Lie

Agreement between records is not equivalent to independent corroboration.

2026-10-28·Forensic epistemology·the-perfectly-corroborated-lie
Research note: scope, status and evidentiary limits are explicit; a methodological primer is not a completed experiment.

The problem

Agreement between records is not equivalent to independent corroboration. A witness statement, news article and AI summary may repeat the same initial report. Counting them as three independent observations artificially multiplies confidence.

Analytical approach

Map source ancestry before weighing apparent consensus. Ask who created each assertion, what material was visible to them, and whether the agreement could occur without the underlying event.

Falsifiable test

A practical falsification test is to remove the common upstream source and ask what independent evidence remains.

Operational implications

A defensible workflow should record the exact input, collection method, version, context, counter-explanation and reason for the conclusion. Reviewers should be able to disagree with the inference without losing the underlying observation. When this topic is applied to a real investigation, safety, lawful authority and domain-qualified professional guidance take precedence over a generic article.

Next research step

Publish a small case study with a documented baseline, an adversarial or failure-mode control, outcome criteria and enough data to reproduce the result. Report inconclusive findings alongside successes. This page is a research primer, not a claim that the proposed test has already been performed.

Source and revision record

Original editorial analysis and definitions. For background reference, consult the source catalog.

Published in this site build: 2026-10-28. · Editorial and correction policy