Does the mind occupy a space?
If this is true then the mind, the YOU, is nothing more than a bunch of biological/chemical reactions. — Sir2u
I would add: ...chemical reactions [which nature depends on the interacting molecules, their ratios, and their spatial distribution in the brain] Thus, the mind is limited by the kind of molecules which form it (not all molecules can form a human mind), the ratios* in which they are found (not all combinations of allowed molecules can form a human mind), and their position with respect to each other (even if you have the allowed molecules at adequate ratios, if they do not follow an allowed distribution in space, you wont have a mind). The last requirement limits the mind to a space, I think; but then the mind does not only depend on the spatial distribution of the molecules which form it; it would also depend on their ratios, absolute quantities*, and their chemical properties**.
* and absolute quantities (?)-as in, even if you have the right molecules and ratios, you need a minimum/maximum amount of each molecule.
** this would lead to the question: why this limits? why a human mind cannot be replicated with any combination of molecules in any spatial orientation other than the allowed ones?
How do we control the chemical reactions? — Sir2u
Honestly, I do not know if we do.
ALSO, I'd like to remind everyone that whatever has been said in all these comments (mine and others') is merely speculative, at least in some (most) part. I say it because I think it is an important reminder.