A dumb doubt on stalls

Roy Smith wrote:

Skywise wrote:


I've been seriously thinking of getting an account [on Wikipedia] so I
can make changes as I see the need.


In about the same amount of time it took you to write that sentence, you
could have made your account. Just got to http://tinyurl.com/6fvtg, type
in a user name and a password, and you're done.

Wikipedia and usenet are similar in many ways. On both, there are experts
and idiots and everything in between. The difference is that on Wikipedia,
articles have a decent chance of evolving towards containing better and
more correct information. On usenet, the same crap just gets recycled.

What causes it to evolve towards more accuracy? I haven't used it, but
I thought most anyone could add to or change the definitions contained
therein. Is this not how it works? Is there some sort of review and
approval process?


Matt