[BrainVirus]

Wikipedia is one of the worst things that was ever launched on the web. Many people say that it's reliable, except in cases of controversy. That's a spin. A more honest way of describing it is that it's a system designed to accumulate trust by providing people with trivial information and then spectacularly fail them when the information is critically important for some society-wide issue. The failures aren't unfortunate mishaps, they are inevitable by design.

[fluoridation]

I'd say it's foolish to turn to an encyclopedia, which by definition is merely meant to impart knowledge not much deeper than introductory, for information of critical importance.