> I'd appreciate if you tried to explain why instead of resorting to ad hominem.
It is not meant as an ad hominem. If someone thinks our current computers can't emulate human thinking and draws the conclusion that therefore humans have special powers given to them by a deity, then that probably means that person is quite religious.
I'm not saying you personally believe that and therefore your arguments are invalid.
> Since the real world (including probabilistic and quantum phenomena) can be modeled with deterministic computation (a pseudorandom sequence is deterministic, yet simulates randomness), if we have a powerful enough computer we can simulate the brain to a sufficient degree to have it behave identically as the real thing.
The idea that a sufficiently complex pseudo-random number generator can emulate real-world non-determinism enough to fully simulate the human brain is quite an assumption. It could be true, but it's not something I would accept as a matter of fact.
> I've re-read the argument (https://en.wikipedia.org/wiki/Chinese_room) and I cannot help but conclude that Searle argues that 'understanding' is only something that humans can do, which means that real humans are special in some way a simulation of human-shaped atoms are not.
In that same Wikipedia article Searle denies he's arguing for that. And even if he did secretly believe that, it doesn't really matter, because we can draw our own conclusions.
Disregarding his arguments because you feel he holds a hidden agenda, isn't that itself an ad hominem?
(Also, I apologize for using two accounts, I'm not attempting to sock puppet)