"I Know I'm Not Wrong" is a song by Fleetwood Mac from the 1979 double LP Tusk. It was included as the final song of side three of the LP on 19 September 1979 and written by Lindsey Buckingham, whose sparser arrangements and the influence of punk rock and new wave were the leading creative force on it and other Tusk tracks. The song was worked on for the duration of the Tusk album and took around a year to complete.