Spamature
President
That's about the only way to be sure all of that's written there could be considered truly factually valid.
Otherwise, it would be just opinions/comments by the writers. imo
I use Wikipedia sometimes but not that much.
Biographies of famous people, I have referred to those at Wikipedia.
If someone spots errors or mistakes, can anyone log in and edit/correct them?
Well they kind of toned down the anyone can edit stuff and are increasingly relying on dedicated volunteer editors. But then again I have never tried to edit a Wikipedia page so you'll I don't have a citation for my statement. Ha ! So you have to use another source to see if it true.