And this is before we get to silicon augmented human brains. Let's say we develop some tech that let's people who have lost the ability to verbalise (say throug

And this is before we get to silicon augmented human brains. Let's say we develop some tech that let's people who have lost the ability to verbalise (say through some accident causing brain damage) regain the powers of speech. Where do you draw the line at the person? What if we move the line, progressively replacing more human brain functions with near-future AI tech? What is it that makes "a person" "this person"? I am utterly fascinated by this whole area from a philosophical viewpoint. I think there's a stack of unresolved philosophical problems and theories that are about to get tested in the harsh light of the sun.