Not the GP, and I don't believe in the existence of "common facts" in general, but Wikipedia is indeed a good place to figure out what other people might agree as common facts...
Well, I'm not sure either what the term "common facts" is supposed to mean, but wikipedia is not a good place to look for what "other people" think, unless if by "other people" you mean a small set of wikipedia powerusers. Just like traditional newspapers are controlled by a small set of editors who decide what's worth publishing, so is wikipedia.
