[namero999]

I don't think that's the point parent was making. Of course in a processor there are only particles, and we can easily detect computation by analyzing how registers and in turn potentials change. The point being made is that this description of computation does not leave behind anything else to be described. In other words, my analysis of the process fully describe the process. I can even simulate my description and obtain the same result (say, 1+1=2 obtained by running a program on silicon or by shifting registers with pen and paper). With consciousness is not so trivial. I can fully describe the neural correlates of you experiencing joy, or recalling a memory, or whatever, and there would be still plenty not captured by my description, which is the endogenous phenomenal experience of it. This is why it's hard. There is no epistemic bridge to cross (or burn).