Mandela Effect is the second remix album by American musician Gonjasufi (Sumach Ecks), released by record label Warp in 2017. His collaborators include underground hip-hop group Shabazz Palaces, Daddy G from Massive Attack, and Nigerian percussionist Tony Allen. The album contains 16 tracks—remixes from his previous album Callus as well as several originals and collaborations. The title refers to the phenomenon of false memories which are shared by numerous people, dubbed the "Mandela effect" by some in reference to mistaken memories of the death of Nelson Mandela before he became president of South Africa.