////////////true//////////////
I think you need to pick a different book....
Primary Source because the primary come from the person who actually live through what they wrote.
And secondary comes from the primary source but they might change stuff so that’s why it is not reliable.
The Mandela effect is a real essay since I have read many essays and huge body paragraphs with Mandela effect in it....So from background knowledge alone, your answer is True, the Mandela effect was in a real essay :)
