Well that's why we do the whole "replace neurons individually" route.
Keep in mind I've thought about this shit a lot >_> I may not be able to articulate what I mean, but I'm getting an education so I can make this a reality, so it's kind of important to me.
You are talking about what I think is refered to in the
Quantum Thief as a "Moravec" upload. There's also a very... well. I guess explained instance in
House of Suns.
As to taking bits out of the brain, well, why would you remove them? If it is because they don't function correctly or map to a robotic body, you'd have to find some way of mapping the extant structure into equivalent bits for controlling it.
I don't see why you wouldn't keep those things, as Hans Moravec said, it's not the abstract reasoning that is hard, it's the perceptual and motor control.
Of course, he did live not long enough to see things like neural network controlled hardware or genetic algorithms, or really any of the ways that we can have robots learn how to walk on their own. Those are relatively straightforward to implement, however the underlying details tend to be a bit nontrivial.
In any case, why can't we just
literally replace neurons with their equivalent machines? One at a time, over years or months or hours, or however long the process takes, with longer providing additional time for the neurological systems to integrate correctly with these machines.
My only problem with uploading is actually that if we only take the brain, we don't have input for the body, unless we simulate that and have something akin to a brain in a jar type thing going on. We would end up having to map those parts of our brains to whatever inputs exist. I think, however, that our brains are about as good at this as they are at anything.
Have any of you seen that video of a chimp with a crude robotic arm plugged into its brain at a basically arbitrary point? It's
here by the way, but look at it, that arm doesn't even put signals back
into the brain, and despite the lack of direct feedback, the monkey learns to control it within a few hours just using vision to guide it.
Our brains are about as good at plug and play as anything that exists, probably even better than most hardware advertised as such. This is because to some degree or another, our brains
optimize their structure in order to accomplish things like this. Our cerebrum has a lot of wiring that seems specific to the structure of our bodies, but even it, the oldest part of our brains, is able to pick up and learn things like this very quickly when it's plugged in.
There's a lot to say about the plasticity which allows this, but if we can simulate that with our artificial neurons, then there's nothing stopping us from doing this. The upside would probably be that we wouldn't have a huge plug directly in our brains, we could probably just add a usb port or something.
--snip--
It depends on magical technology and a massive number of simplifying assumptions either way, so I don't think it matters at all which way you do it. This is an armchair-philosophical argument, after all. Bringing practical matters into it is like 18th century priests arguing about how exactly lasers should work.
Truthfully, once we've figured out exactly how the mind works (which I'd assume is the prerequisite for replacing bits of your brain with superconductive wiring free of mortal flaws or, for some reason, fake neurons), why bother copying yourself at all? Get one person, copy their mind as many times as required, then tweak and customize until you've got the you (or not-you if you're inclined) that you're generally happy with, then copy that for all the purposes you think you'd like to be immortal for. One for your crowdfunded space probe, one for your supercooled server bank generating a persistent digital paradise, one for your futuristic smartphone. Safe and efficient.
That does make me wonder, how would transhuman initiatives fare once they actually begin to show useful results? I mean, if human cloning is an assault on human dignity, where does that leave digitization of the mind (which would imply easy reproducibility that'd put any visions of a clone-dominated future to shame)?
Why not? There's a lot of ethical decisions to be made about that, but so long as we do it to ourselves, what can go wrong?
Why is human cloning an assault on human dignity? It's only that way if the clones are
owned. I wouldn't support that any more than I'd support slavery of any sort. In that case, human cloning isn't useful in the same way because it's not yo
u, it's just a clone of you. Clones are as useful as a backup as children are.
In any case,
The Quantum Thief has this too. All of the software is based on uploaded human minds, because apparently in that universe AI is damn near impossible if it isn't based on human architecture.