To quote directly To be canceled this process requires the presence of at least one reliable source that supports at least one statement made about the person in the biography Do not remove the until the biography has at least one such source However point two of the same policy says 2 however in borderline cases such as where a source of arguable but questionable reliability has been added the biography should be listed instead at Articles for Deletion In short if there is a source in the article but its reliability is being questioned unless there is clear consensus that the source is not reliable an AfD is preferable to a BLPPROD