Wikipedia:Content policy in a nutshell

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This is an essay; it contains the advice and/or opinions of one or more Wikipedia contributors. It is not a policy or guideline, and editors are not obliged to follow it.
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WP:NUTSHELL

Articles appropriate for this encyclopedia, cite verifiable claims from reliable sources (in proportion), without presenting our own claims.

Contents

[edit] Wikipedia:Verifiability

Claims should come from published sources that can be verified by other Wikipedia editors.

[edit] Wikipedia:Reliable sources

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.

[edit] Wikipedia:Citing sources

Citing verifiable reliable sources is necessary for editors to verify the claims and assess the reliability of the references.

[edit] Wikipedia:Neutral point of view

Wikipedia articles should present the claims and opinions appearing in the published body of reliable sources, in proportion to their prominence.

[edit] Wikipedia:No original research

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.

[edit] Wikipedia:Notability

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.