Wikipedia:Reliable sources/Perennial sources

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:Reliable sources guideline. It may reflect differing levels of consensus and vetting.

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This page in a nutshell: This is a list of repeatedly discussed sources, collected and summarized for convenience. Consensus can change, and context matters tremendously when determining how to use this list. Only sources that have been repeatedly raised for discussion are listed here, it is not a general or comprehensive list of all generally reliable or unreliable sources in the world, it is a summarization of discussions about the listed sources.

The following presents a non-exhaustive list of sources whose reliability and use on Wikipedia are frequently discussed. This list summarizes prior consensus and consolidates links to the most in-depth and recent discussions from the reliable sources noticeboard and elsewhere on Wikipedia.

Context matters tremendously, and some sources may or may not be suitable for certain uses depending on the situation. When in doubt, defer to the linked discussions for more detailed information on a particular source and its use. Consensus can change, and if more recent discussions considering new evidence or arguments reach a different consensus, this list should be updated to reflect those changes.