Certain '''[[Red flag (signal)|red flag]]s''' should prompt editors to examine the sources for a given claim:
* surprising or apparently important claims not covered by mainstream sources;
* reports of a statement by someone that seems out of character, embarrassing, controversial, or against an interest they had previously defended;
* claims that are contradicted by the prevailing view within the relevant community, or which would significantly alter mainstream assumptions, especially in science, medicine, history, politics, and biographies of living persons. This is especially true of claims whose proponents consider that there is a [[conspiracy theory|conspiracy]] to silence them.
Exceptional claims in Wikipedia require high-quality reliable sources; if such sources are not available, the material should not be included. Also be sure to adhere to other policies, such as the policy for [[Wikipedia:Biographies of living persons|biographies of living persons]] and the [[WP:UNDUE|undue weight]] provision of [[WP:NPOV]].
