Mandela Effect, "destroyed" my grades

For the few that do not know,
"Mandela effect" is a term coined where many people collectively remembered, having the same memory but in reality is not documented.

Why "Mandela" everyone remember Nelson Mandela passing away back in the past like 20 30 years ago. Even for me I remembered him as a historical figure...? A false memory (there's a theory about it)

But guess what , nope he was still alive and when he passed away in 2013 and made news I was like hmm what....?

That being said Mandela effect.
I now have a perfectly convincing answer to tell my parents and my teachers back in school when I had spelling test .

Teacher "hey why did you score only 45?"
Me "Mandela effect"

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Im into conspiracy theories, just wanted to say that the above post doesn't dictate my understanding of it,

for those that got my humour, I like to say
Let's be friends hahahaha