The Mandela Effect Effect
Due to the Mandela Effect which was popularized in 2010 people discovered Nelson Mandela was actually alive and did not die in prison in the 1980s. He later did die in 2013. Because the Mandela Effect is more commonly known than the effect's namesake, many people believe he is still alive.
Nelson Mandela actually died in 2013; you are the victim of the Mandela Effect Effect.