Wikipedia is a separate site from WikiAnswers. WikiAnswers does not control the content of Wikipedia, so we cannot answer for any incorrect content on Wikipedia.
Wikipedia is an encyclopedia. However, legally, it is a passive content provider (meaning that all content is provided by volunteers, not by the organization that runs Wikipedia).
Wikianswers draws some of its content from Wikipedia, under the terms of the cc-by-sa license which allows for free reuse of Wikipedia content, provided certain conditions are met.
Wikipedia even says..."We do not expect you to trust us".
Wikipedia's inappropriate content is often referred to as vandalism. This involves adding false information, offensive language, or inappropriate images to pages. Wikipedia relies on users to help monitor and remove such content.
WikiAnswers and Wikipedia are two different companies. However, Wikipedia does have an agreement with Answers.com that allows them to use their content in the ReferenceAnswers area.
Wikipedia
A content distribution network is used to serve content to users with high availability and performance. You can learn more about this at the Wikipedia.
All the time, at least when there not busy!
The Wikipedia service is the biggest multilingual free - content encyclopedia on the internet. In addition, Wikipedia was first launched on January 15, 2001.
I have also seen that wikipedia ranks on the first page of google from different keyword phrases. The reason behind this is the quality of the content which wikipedia provide. Wikipedia always shows unique and useful content to its users and the domain authority of wikipedia is very good that's why wikipedia rank on first page of google for so many searches.
If you mean to ask "are there other user generated content encyclopedias", the answer is yes. For instance, Baidu.