Wikipedia has been censored by governments that occurred widely in countries including (but not limited to) China, Iran, Myanmar, Pakistan, Russia, Saudi Arabia, Syria, Tunisia, Turkey, Uzbekistan, and Venezuela. Some instances are examples of widespread Internet censorship in general that includes Wikipedia content.

Sometimes inaccurate information is posted to Wikipedia on purpose, as a hoax. In some well-documented cases, this inaccurate information continues to spread when people take it from Wikipedia and use it in books and articles.

Wikipedia is free, non-profit, and has been operating for over two decades, making it an internet success story. At a time when it’s increasingly difficult to separate truth from falsehood,...

Ideological bias on Wikipedia, especially in its English-language edition, has been the subject of academic analysis and public criticism of the project. Questions relate to whether its content is biased due to the political, religious, or other ideologies its volunteer editors may adhere to.

However, Wikipedia's administrators protect some pages from direct editing if they believe they are regularly subjected to "vandalism" - the addition of abusive language or...