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Why primary sources lie — and how historians account for the distortion

June 24, 2026 · 5 min

David Sterling & Megan Skiendel

Primary sources are structurally biased by design — not by accident. The Victory Stele of Naram-Sin, carved around 2300 BC, is among the earliest surviving official records, and it praises a military campaign rather than documenting it. Historians manage this permanent distortion through triangulation and absence reasoning, but never eliminate it.

Historical inquiry is structurally constrained by the nature of primary sources — documents, artifacts, letters, and records produced at or near the time of events. These sources are indispensable precisely because of their proximity to the past, but that same proximity means they encode the perspectives, motives, and blind spots of their creators.

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About this episode

Every primary source is also a performance. A letter, a royal proclamation, a colonial dispatch — each one was written by someone, for someone, with something at stake. That structural bias isn't an occasional problem historians work around. It's a permanent property of the evidence itself. This episode starts in 2300 BC with the Victory Stele of Naram-Sin — one of the earliest surviving official records, which praises a king's military campaign rather than documenting it — and traces the same distortion forward through 1857 India, the French Revolution, and Lippmann's analysis of press coverage of the Russian Revolution. The pattern holds across every era. The toolkit historians use — source triangulation, contextual analysis, reasoning from absence — is real and necessary. But the episode presses on its limits: triangulation breaks when all surviving accounts come from the same class of people. Convergence can be corroboration of shared bias, not confirmation of fact. What makes this episode stick is the Lord Canning example: two completely different records of the same events, separated by 48 hours, written by the same man. One private, one public. The real stakes live only in the gap between them. And if the private version hadn't survived, the gap would be invisible. By the end, the episode lands somewhere genuinely unresolved — the methodology historians built to account for incomplete, filtered evidence may be the methodology for any evidence-based claim, in any field. That's either reassuring or unsettling, and the episode doesn't pretend to settle it.

Frequently asked

Why are primary sources considered biased?

Primary sources are biased because they were produced by specific people, for specific audiences, toward specific ends — not to document events neutrally. The Victory Stele of Naram-Sin, circa 2300 BC, is among the oldest surviving official records and is promotional, not descriptive. Bias is a permanent structural property of historical evidence, not an occasional flaw.

What is source triangulation in historical research?

Source triangulation means comparing multiple independent accounts of the same event: convergences point toward fact, divergences point toward bias or propaganda. The method has limits — if all surviving accounts come from the same literate, powerful class, convergence reflects shared bias, not confirmation. The 1919 Jallianwala Bagh massacre illustrates this: British and Indian accounts are irreconcilable.

What is absence reasoning in historical research?

Absence reasoning treats gaps in the historical record as load-bearing evidence rather than empty space. Lord Canning's 1857 private letter to Queen Victoria admitted 'indiscriminate vindictiveness' by British forces; his public dispatches were controlled and measured. If the private letter had not survived, the actual story — revealed only in the gap — would have been lost entirely.

How do historians distinguish between a document's stated content and its actual historical significance?

Historians ask who wrote a document, for whom, under what constraints, and toward what end — not just what it says. Louis XVI's proclamations were crafted to shore up monarchical authority, not to record events accurately. R.G. Collingwood described historical reconstruction as 'imaginative construction stretched between certain fixed points,' with verified documents as anchors.

Does the problem of biased sources apply outside of history?

Yes. Walter Lippmann co-authored an early systematic study of bias in newspapers by analyzing New York Times coverage of the Russian Revolution, identifying the same structural source-bias problem historians face. The same issue applies to climate models, medical research, and financial reporting — any evidence base that is incomplete and filtered through whoever had the resources to generate the record.

Grounded in 12 sources
Bias in Historical Description, Interpretation, and Explanation · jstor.org
Overdetermination, underdetermination, and epistemic granularity in the historical sciences | European Journal for Philosophy of Science | Springer Nature Link · link.springer.com
Sage Research Methods - The SAGE Handbook of Historical Theory - Post-Positivist Realism: Regrounding Representation · methods.sagepub.com
Philosophy of History (Stanford Encyclopedia of Philosophy) · plato.stanford.edu
Richard Evans on Truth, Objectivity, and the Boundaries of Reasonable Historical Interpretation – Exploring the Past · pastexplore.wordpress.com
(PDF) Postmodernism and The Nature of History · academia.edu
’You got your history, I got mine‘ · culturahistorica.org
LIMITATIONS OF HISTORICAL RESEARCHES · dash.hrecos.org
Evaluating Sources in History - Del Mar College · delmar.edu
How to Evaluate Them - Primary Sources in History - Research Guides at Swem Library, William & Mary · guides.libraries.wm.edu
How to evaluate the reliability of sources - History Skills · historyskills.com
Evaluating primary and secondary sources - History Subject Resource Guide - LibGuides at Hofstra University · libguides.hofstra.edu
Read transcript

Megan Skiendel: Read a Yelp review lately written by the restaurant owner? No, I mean — you can usually tell. The facts check out, technically. But everything chosen, everything left out — it's calibrated. That's actually what a primary source is.

David Sterling: A primary source. Documents, records, letters — produced at or near the time of the event.

Megan Skiendel: Indispensable to historians. And never neutral. That's the tension this whole episode lives in. Structural bias in sources isn't an occasional problem — it's a permanent, inescapable property of the evidence itself. You can manage it. You cannot eliminate it.

David Sterling: And the timeline on this goes back — how far, exactly?

Megan Skiendel: Twenty-three hundred BC. The Victory Stele of Naram-Sin — an Akkadian king — is one of the earliest surviving official records we have. It praises his military campaign. Doesn't describe it. Praises it. That's not a modern problem with spin culture. That is the origin point.

David Sterling: Wait. The very first record is promotional material.

David Sterling: So what do you actually do with that? The toolkit historians use — contextual analysis, triangulation — those are systematic responses to that problem. Who wrote it, for whom, under what constraints, toward what end.

Megan Skiendel: Right. And source triangulation is the move — compare multiple independent accounts, convergences point toward fact, divergences point toward bias or propaganda. Sounds clean.

David Sterling: Until you get Jallianwala Bagh.

Megan Skiendel: 1919. British colonial records — 'restoring order.' Indian nationalist accounts — imperial brutality. Same event. Irreconcilably different primary source narratives. Triangulation doesn't resolve that.

David Sterling: And that's — well, that's where I get skeptical of the whole framework, actually. Because triangulation is only as good as the independence of your sources. If every surviving account comes from the same literate, powerful class — convergence isn't confirmation. It's corroboration of a shared bias.

Megan Skiendel: Elite echo.

David Sterling: Richard Evans has this — historians disagree about a mountain's appearance, but they must all be painting the same mountain. I find that reassuring up to a point. Interpretation varies, facts converge. But the question I can't get past is — what if the mountain you're painting was pre-selected by who survived to write it down?

Megan Skiendel: That's exactly it. And Lord Canning is the case that breaks it open for me. 1857, Indian Mutiny — he writes privately to Queen Victoria admitting 'indiscriminate vindictiveness' by British forces. Terrified. Strategy failing. Needs permission to escalate. Then his public dispatches, forty-eight hours later — controlled, measured, inevitable. Same man, same events.

David Sterling: Two completely different historical records.

Megan Skiendel: I mean — I've sat in rooms where that's the email chain versus the earnings call. It's not dishonesty, exactly. It's audience-appropriate calibration. The real stakes only live in the gap between the two versions. Which means if the private letter doesn't survive, you've lost the actual story entirely.

David Sterling: Louis XVI's proclamations are the same architecture. Crafted to shore up monarchical authority — not to document what was happening. So the absence isn't random. It's load-bearing. What doesn't get written is a decision.

Megan Skiendel: Forensic accounting, honestly. The real story was never what got recorded — it was when something stopped being documented, who got dropped from the email copy. The gap is the data.

David Sterling: Collingwood called it — wait, his exact phrase — 'imaginative construction stretched between certain fixed points.' The fixed points are Canning's letter, the date, the money moved. Everything else is bounded imagination. Which is fine. Until you ask whether even that bounded construction escapes present-day assumptions about which gaps matter.

David Sterling: And that's — frankly, that's the thing I can't put down. Because if present-day assumptions shape which gaps matter, then it's not just history with that problem. Lippmann — co-authored the first systematic study of bias in newspapers, analyzing the Times' coverage of the Russian Revolution. Journalism. Same structural source-bias problem. And then you extend it: climate models, medical research, financial reporting — anything where the evidence base is incomplete and filtered through whoever had the resources to generate the record.

Megan Skiendel: The postmodern critique isn't wrong about that. Power shapes what survives.

David Sterling: No — and I'm not dismissing it. But if you accept it fully, then triangulation, contextual analysis, absence reasoning — the whole toolkit Collingwood and Evans built their framework around — that's not a history methodology anymore. That's the methodology. For any evidence-based claim. And I don't know whether that's reassuring or... I'm still turning that over.

Why primary sources lie — and how historians account for the distortion · Onpode