@CSmith327 &
@Kampfarsch: Let's... leave it as "scientifically unconfirmed" to avoid drama, yes?
And as for the brain uploading thing, my opinion is different. I've seen several plots like that and the mayority are of the sense of that the brain doesn't get uploaded per sé, just a copy of the brain is. The original brain is still the same person, just that there's a digital copy around, like in this manga.
In the same vein, I think that when an AI enters a biological body it doesn't remove souls, consciences or anything, those things are more complicated than that. They just "rewrite" them. The person, in a way, is still the same. They just think they're somebody else, and may even have some of the quirks or mechanical memory of the original personality.
For example, if the original host of the body has an habit of always drink his coffee with two spoonfuls of sugar, even if the AI inserted is a blank slate, the AI will have the habit of drink it's coffee with two spoonfuls of sugar. That sort of things.