I’d considered the situations in the article, but I do wonder - if you replace 10% of someone with identical particles then they are the same. 20%, 30%, etc the

I’d considered the situations in the article, but I do wonder - if you replace 10% of someone with identical particles then they are the same. 20%, 30%, etc then yes the same. But. 80%? Sure. Replace limbs and body and I can see that. But what about splitting the brain (as in article) where you don’t even need 50% for continuity. But we effectively always get back the the ship of Theseus, and circling back to Trek, Does Data have a soul? I don't know that he has. I don't know that I have. But I have got to give him the freedom to explore that question himself.