Not sure why I missed this the first time around. I believe it is nothing more than memory error
I've experienced the Mandela Effect. I remember the Berenstain Bears with Stain at the end. I remember a movie with Sinbad playing a Genie. I remember "Luke, I am your father." But "Luke, I am your father" makes no sense. Read the dialogue that way:
Vader: Obi Wan never told you what happened to your father
Luke: He told me enough. He told me you killed him.
Vader: Luke, I am your father.
Why would he address him as "Luke" at that point? Luke was aware he was talking to him. Doesn't this make more sense:
Vader: Obi Wan never told you what happened to your father
Luke: He told me enough. He told me you killed him.
Vader: No, I am your father.
The reason people remember it wrong is because they don't ever quote the first two lines. They only quote the "I am your father" line. So naturally, to convey the full meaning of the quote, they give it context by showing that Vader is speaking to Luke." It's easier to quote "Luke, I am your father" that doing all three lines. And just quoting "No, I am your father" doesn't indicate that we are talking about Vader and Luke at all.
I'm a cognitive psychologist. That means I study the parts of the brain and how they function. A major part of my education has to do with memory. And absolutely everything about the Mandela Effect can be explained by the simple fact that our memory actually sucks. First, there is no such thing as a photographic or eidetic memory. People have claimed there is but not a single person has been able to prove it under controlled conditions. Not only that, but we are not even close to being aware of everything that is going on around us. We only perceive what our brain thinks is necessary for us to perceive at any time.
Our brains tend to leave out things that are not necessary and they will often see things in a way that is easier for us to experience it. For example, the Berenstain Bears. Our mind can tell us it is the Berenstein Bears because were are familiar with "Stein" at the end of a name than Stain. It's familiarity and our brains like that. It's easier to remember something we've seen before than it is to create a new idea.
And an argument for the Mandela Effect is how can so many people have the same wrong memory. That's easy enough to explain. If I am capable of making a memory mistake, that memory mistake is being made for a reason. Our brains work all work the same way and with the same stimuli to work with, it makes sense that people will make the same mistake.