The thing to remember is to check the cited sources whenever the information is remotely important to you.

See https://www.theregister.com/2017/01/16/wikipedia_16_birthday... or this from Charles Seife:

"Wikipedia is like an old and eccentric uncle. He can be a lot of fun—over the years he's seen a lot, and he can tell a great story. He's also no dummy; he's accumulated a lot of information and has some strong opinions about what he's gathered. You can learn quite a bit from him. But take everything he says with a grain of salt. A lot of the things he thinks he knows for sure aren't quite right, or are taken out of context. And when it comes down to it, sometimes he believes things that are a little bit, well, nuts. If it ever matters to you whether something he said is real or fictional, it's crucial to check it out with a more reliable source."

—Charles Seife, Virtual Unreality, Appendix, "The top ten dicta of the internet skeptic", Dictum no. 1.