Reliable and unreliable website

Unreliable website: http://www.wikipedia.org/
This website is unreliable because people can go in an changes the information then when people use this website, they will know the opinions of someone else, not the facts. There are some facts and some opinions in wikipedia.
Reliable website: http://www.google.com/
This website is reliable because it is a search engine, people use it to find websites, it only show the websites.