Compare Two Conflicting Sources Without Choosing Too Soon
Two sources give different years for the same event. Choosing the one that fits your draft is tempting, especially when the story otherwise works. Pause the narrative and put the claims beside each other. The disagreement may concern different events, different meanings of a word or an error that needs another source.
Copy each claim accurately with its reference. Include enough surrounding wording to understand what the source is asserting. A building “opened” in one account and “completed” in another may not be a direct contradiction until you know what each author meant.
Use a comparison that keeps the evidence visible
| Question | Source A | Source B |
|---|---|---|
| What exactly does it claim? | Record the wording and reference | Record the wording and reference |
| When was it created? | Distinguish creation from later publication | Keep uncertain dates marked |
| How could the creator know? | Note the stated basis, if available | Avoid inventing a source of knowledge |
| What remains unclear? | Name the gap | Name the gap |
The table is a working aid, not a scoring system. An earlier source is not automatically correct in every detail, and a later account may preserve information you have not yet found elsewhere. Examine the particular claim rather than assigning one document permanent authority.
Check whether the sources depend on each other. Two later histories may repeat the same original statement, so their agreement does not necessarily represent two independent observations. Follow citations or acknowledged sources where possible and record the route.
Look for a question small enough to answer
If the disagreement concerns a date, identify what event would establish it. A first advertisement, a formal dedication and the beginning of ordinary use might occur at different times. Search for evidence that matches the wording of the claim instead of looking for any document containing the preferred year.
Check names, places and definitions. Similar institutions may have moved, changed names or operated more than one site. Keep those possibilities as questions until the evidence supports them. A neat explanation should not become a fact merely because it reconciles the two sources.
Record unsuccessful checks with their scope. If a newspaper search returns nothing, note the title, years and terms used. That result may guide the next search, but it does not automatically disprove the event described elsewhere.
Write uncertainty in proportion to the evidence
If the conflict remains unresolved, say what each source reports and why you cannot yet choose. A short account can retain uncertainty without becoming unreadable. Avoid a precise date in a headline or timeline when the body of the research cannot support it.
When a new source resolves part of the question, update the comparison and explain the change. Preserve the earlier notes so another researcher can follow why your interpretation moved. Correcting a conclusion is easier when its supporting steps remain visible.
Return to the narrative only after the comparison has clarified what can safely be said. The story may become less tidy and more informative: a sequence of related events rather than a single date that was never as simple as it first appeared.