If take a young tree and carve your name into the tree will still grow, and it will grow new branches, but your name and the stump will always still be there. The neurons in your brain and like trees with roots and branches sending signals that talk to each other. When strong memories happen the brain has a flash mode that comes from your amygdala that like a camera flash for the memory freezes and forms a strong imprint on your neurons. The brain then has to grow around that, it won’t replace it.
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