Wikipedia:Tip of the day/December 31, 2007

Not everything that's true is verifiable

One of the most important criteria for inclusion of articles in Wikipedia is verifiability. Wikipedia is not a place to publish original research. Instead, we restate, summarize and structure knowledge that has already been published in many forms. So, wherever possible, include a source for your information that readers can follow up.

Read more: Verifiability

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