Let's play another game, then. Assume that over time, you go to the neuroscientist, and they replace a very small part of your brain with artificial technology

Let's play another game, then. Assume that over time, you go to the neuroscientist, and they replace a very small part of your brain with artificial technology of some sort. But they do so in a way that you can not tell the difference. You repeatedly do this, until there is no natural substances left in your brain. If you like, you can continue with all other body parts. Is it not you?