Today’s pseudo-scientific paradigm is designed to take you out of reality and into pseudo-reality. Real science becomes fake science when arguments based on consensus belief trump observational data. One consensus belief states "all the ancient Greeks" says the world is round. So when Mandela Effect pushers make arguments on the authority of collective memory, they're using fake science to prop up a false paradigm. They're misinterpreting observational data by not accounting for the fallibility of the observer, in this case, themselves. This is why objective evidence matters. Individual perceivers are not only capable of being wrong, they are doubly capable of defending their wrongness once it becomes entrenched as dogma.