May 29, 2022

Verifiability means that people reading and editing the encyclopedia can verify that the information comes from a reliable source. Wikipedia does not publish unpublished research; all of its content is determined by previously published information rather than solely based on the opinions, beliefs and experiences of its editors. Even if you are certain that something is true, it must be verifiable through the sources of the information before you add it. The principle of verifiability is one of Wikipedia's three content guidelines. The other two are the principle of impartiality and the principle of non-incorporation of unpublished research. Together, these guidelines determine the type and quality of material that is eligible for publication on Wikipedia's primary domain. Since these three guidelines are mutually complementary, they should not be interpreted in isolation and editors should therefore familiarize themselves with all three. The principles on which these three guidelines are based are non-negotiable at the level of Portuguese-speaking Wikipedia and cannot be changed by other recommendations, votes or consensus from the editor community.

Verifiability Policy

Articles should only contain material that has been published in a reputable source. Users adding new material must cite a reputable source. If this is not the case, any editor may remove the material entered. The obligation to provide a reputable source lies with the editor who wishes to introduce new material and not with editors who wish to remove the same material.


Wikipedia articles must be based on credible and independent sources. Such sources must have a reputation in terms of their own factual assessment and accuracy. With regard to academic matters, sources should preferably be subject to peer review. The sources should also be leveled according to the assertions made, that is, extraordinary claims should be based on sufficiently robust sources. It is advisable, whenever possible, to provide sources available in Portuguese. If this is done, readers will more easily be able to verify that the material that served as a source was used correctly. To ensure verifiability, it is recommended to indicate, when available in the source, the chapter, section, and page(s). ) where the respective content of the referenced book/article can be found. In the impossibility of citing any of these identifiers, a brief citation of the text in the reference can be made, attesting to the passage.

Burden of proof

For more information on writing citations, see Wikipedia:Cite sources The burden of proof rests on editors who have introduced certain information into an article or on those who wish the information to be retained. Editors must therefore provide references. If certain information in an article is not based on reputable, reliable, and independent sources, Wikipedia should not include that information.

Removal objections and alternatives

Any edits that omit the fonts may be removed. However, keep in mind that some editors may object to this removal because the opportunity has not been given to provide sources. In practice, this means that all unsourced material that is removed can only be reintroduced into the article with citations. , assigning this text to a trusted source in the form of a reference placed in the text, and that the source directly supports the material in question. of discussion. Alternatively, you can place the {{Fonts}} template right after