Beau said:
I agree with all that. These examples seem to be less about the Mandela effect and more about the way people remember things and like you said, the way people fill in the blanks with regards to memory or don't notice/remember details like the scarecrow having a gun. I did watch Star Wars religiously as a kid and never once noticed a silver leg, but others have told me that he did indeed have that, so the simplest explanation is that I just never paid close enough attention.
Yeah. Take the "Luke, I am your father" example. The original says "No" instead of "Luke", because it is in reply to Luke saying something like "I know enough, you killed my father!", so replying "no" makes sense. But when quoting the phrase afterwards, there is no point in contextualizing it within a dialogue, so it's natural to come up with a memorable, close enough phrase. One that makes it clear that it's about Star Wars, by including the word "Luke". Basically, the brain fills the blanks for convenience in a (semi) automatic way.
Remember the man in the gorilla suit walking among the basketball players. I know people who swear the gorilla was NOT there when they watched it the first time, even when the same tape was rewinded immediately to prove to them that it was. Likewise, we never noticed C3PO had a silver leg because nothing in the movies hints to it being of any significance and under bright light gold and silver are easily confused.
I watched some of the video with examples of how geography has supposedly changed, and I think that most of the examples can be explained by the distortions in maps as opposed to actual globes. Countries look bigger, smaller or misplaced, etc.
Thinking about Mandela, if people hear the suggestion that he died in jail, it sort of 'makes sense' considering all we know about him, so the brain just accepts it. But in reality, he didn't. I remember him getting out of jail, but when I first read that he could have died in jail instead, I doubted if he had - cause it's plausible.
'Sex and the City', I always remember it being like that, but it's easy to see how people can remember it as "in". It sounds similar and it actually makes more logical sense. It's more natural to think that "sex happens in the city", than "sex" and "city" being two items that can be listed together like, say, apples and oranges.
I don't discount the possibility of real shifts of timelines, but I don't think we've come across a convincing example yet.