[brox]

Molly White, a prolific Wikipedia editor, has written a good overview of how information source reliability is handled in practice: https://www.citationneeded.news/elon-musk-and-the-rights-war.... There's a process for how decisions about source legitimacy and reliability are made, and these "decisions aren’t made lightly and are frequently revisited: there have been over fifty discussions about the Daily Mail’s reliability, for example, with both sides being vehemently argued".