Probably the most famous Mark Twain quote he never said:

“If you don’t read the newspaper, you’re uninformed. If you do, you’re misinformed.”

This quotation is regularly misattributed to Mark Twain on social media. According to the Center for Mark Twain Studies, the quotation moved to social media after becoming a commonly cited aphorism among newspaper columnists around 2007. The center notes the irony that Twain might have appreciated: “newspaper writers writing in newspapers about the unreliability of newspaper writing and citing an unreliable source to testify to that unreliability”. (Twain never said that, either. Just to be clear, it was written by the Center for Mark Twain Studies.)