Wikipedia:Content policies and guidelines in a nutshell
 | This is an information page. It is not an encyclopedic article, nor one of Wikipedia's policies or guidelines; rather, its purpose is to explain certain aspects of Wikipedia's norms, customs, technicalities, or practices. It may reflect differing levels of consensus and vetting. |
Articles appropriate for this encyclopedia, cite verifiable claims from reliable sources (in proportion), without presenting our own claims.
Claims should come from published sources that can be verified by other Wikipedia editors.
Verifiable claims should be based on references released by established experts and/or publishers with editorial oversight that have a reputation for fact-checking and accuracy.
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Citing verifiable reliable sources is necessary for editors to verify the claims and assess the reliability of the references.
Wikipedia articles should present the claims and opinions appearing in the published body of reliable sources, in proportion to their prominence.
Claims must be verifiable in reliable references; consequently, editors may not insert their opinion or analysis of a subject into Wikipedia articles, explicitly or through presentation.
Wikipedia articles require enough reliable independent sources to justify a complete article. There are subjects that possess enough sources to build some kind of article, but what Wikipedia is not still applies.