It is Wikipedia's Featured Articles that are especially trustworthy in contrast to normal or even good articles, as they have to pass even more rigorous "tests" to become featured, as they are to be "the best of Wikipedia", "a model for other articles", and thus, a more reliable source than average articles.

How is Wikipedia reliable?

Wikipedia carries the general disclaimer that it can be "edited by anyone at any time" and maintains an inclusion threshold of "verifiability, not truth." This editing model is highly concentrated as 77% of all articles are written by 1% of its editors, a majority of whom are anonymous.

What are reliable sources for Wikipedia?

Many Wikipedia articles rely on scholarly material. When available, academic and peer-reviewed publications, scholarly monographs, and textbooks are usually the most reliable sources.