How pages develop
Understand what an article's dates and changes tell you before relying on a saved link, example or calculation.
First reading
The useful starting point is the page you can actually open. Its title, explanation, examples and source context should describe the same question. A menu label or planned topic does not establish that a complete guide is already available.
An article date and a source-access date describe different events. The first belongs to the article; the second records when a reference was consulted. An older source can still be relevant, while a newly accessed source may describe research published much earlier. Read the label beside the date before interpreting it.
When it changes
A source may be corrected, an example may reveal a missing condition, or a reader may identify a confusing instruction. The important change is the one that affects understanding or action. Cosmetic changes should not be mistaken for a fresh assessment of the evidence.
A saved copy can therefore differ from the current page. Return to the original link before relying on a quantity or instruction that may have changed. Source controls help distinguish the source material from the article's own explanation.
A correction route
If two versions appear to disagree, identify the wording or example rather than assuming that the newer date settles the issue. The relevant question is what changed and whether the change affects the decision at hand.
The correction page explains how to report that difference. A precise page link and a brief account of the discrepancy are more useful than a complete copy of private notes or correspondence.