First of all, researchers believe that many great men will be recognized and respected after their death. Their life value is usually confirmed after death. Therefore, researchers speculate that people in the future may have memory modification cards. They successfully decorated some memories of modern people with this card, thus causing the phenomenon of "suspended animation" of great people, which can make the image of great people taller and deepen people's impression of them. Most people think this is too incredible and unacceptable.
The second idea is that the orbit of the universe may have deviated, and the parallel universe may have crossed the universe. Parallel cosmology points out that there are many universes in space, and the world outside the universe is called parallel universe. In general, the elements in the parallel universe are the same as those in the universe, but different universes are independent. The two do not affect each other. However, if there is unexpected overlap in different universes, the situation in parallel universes may be projected into the universe. Therefore, if Mandela, who lives in a parallel universe, has already passed away, and this scene has just been projected into the universe, it is not surprising that people have memory errors.
Finally, the researcher also thought of the situation of "moving with the wind", that is, at first, some people spread the wrong message that "Mandela has been dead for many years". Many people think that with the passage of time, it is true and spread blindly, the real situation is no longer accepted by people, and people will only keep the wrong memories printed in your mind.