 | This page in a nutshell: Everything in Wikipedia articles must be attributable to a reliable, published source. |
The threshold for inclusion in Wikipedia is whether material is attributable to a reliable, published source. Wikipedia is not the place to publish your own opinions, experiences, or arguments.
By "attributable," we mean that a reliable source exists for it, though in practice it may not be necessary to add the attribution to the article. That Paris is the capital of France is attributable, meaning that we know a source exists for it, but it need not actually be attributed, because no one would reasonably challenge it. Editors should provide attribution—in the form of an inline citation— for any material challenged or likely to be challenged, and for all quotations. The burden of evidence lies with the editor who wants to add or restore the material.
This policy and Neutral point of view jointly determine the kind of material that is acceptable in articles. The policies are complementary and should not be interpreted in isolation from one another.
- Unattributed — material for which no source has been found.
- Unattributable — material for which no source can be found i.e. original research.