alt Hacker News> If you simulated a human brain by the atom,
That is what we don't know is possible. You don't even know what physics or particles are as yet undiscovered. And from what we even know currently, atoms are too coarse to form the basis of such "cloning"
And, my viewpoint is that, even if this were possible, just because you simulated a brain atom by atom, does not mean you have a consciousness. If it is the arrangement of matter that gives rise to consciousness, then would that new consciousness be the same person or not?
If you have a basis for answering that question, let's hear it.
Replies
Well, if you were to magically make an exact replica of a person, wouldn't it be conscious and at time 0 be the same person?
But later on, he would get different experiences and become a different person no longer identical to the first.
In extension, I would argue that magically "translating" a person to another medium (e.g. a chip) would still make for the same person, initially.
Though the word "magic" does a lot of work here.
At some point, quantum effects will need to be accounted for. The no cloning theorem will make it hard to replicate the quantum state of the brain.
> You don't even know what physics or particles are as yet undiscovered
You would not need the simulation to be perfect; there is ample evidence that our brains a quite robust against disturbances.
> just because you simulated a brain atom by atom, does not mean you have a consciousness.
If you don't want that to be true, you need some kind of magic, that makes the simulation behave differently from reality.
How would a simulation of your brain react to an question that you would answer "consciously"? If it gives the same responds to the same inputs, how could you argue it isnt't conscious?
> If it is the arrangement of matter that gives rise to consciousness, then would that new consciousness be the same person or not?
The simulated consciousness would be a different one from the original; both could exist at the same time and would be expected to diverge. But their reactions/internal state/thoughts could be matched at least for an instant, and be very similar for potentially much longer.
I think this is just Occams razor applied to our minds: There is no evidence whatsoever that our thinking is linked to anything outside of our brains, or outside the realm of physics.