Not necessarily. There is no one on earth who has the exact same genome as you, not even identical twins because of epigenetics. The cells of the person who made those mistakes contained your genes, but all those cells are gone now. Therefore, it was not a different person who made the mistakes, but instead more of a clone of yourself.
That’s what i was trying to say, sorry if there was a misunderstanding. I was trying to explain that the body you were operating in was exactly the same as the one you operate in today, so it’s like a clone, not that it’s a different person inside.
Not ALL of your cells. neurons don't. New neurons form, and old ones die, but they don't replace themselves the same way as other cells. Oh, and neurons last a LOT longer, otherwise you'd literally only be able to remember the last 7 years of your life.
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