@ SYN
Yes, I follow what you are saying and understand why you stand behind the reasons you cite.
HOWEVER, the analog/digital+electrical/electrical+chemical differences don't add up to explain sentience.
I fully understand that computer chips, as they sit today, are not as complicated as the human brain. You'll note I mentioned that, and asked what happens when they are?
The greater number of possible signal between 0 and 1 analog (theoretically infinite, of course, but in fact limited by the detection threshold of the receiver) and 0 and 1 digital is meaningless if the digital processor can sends 10 trillion times as many signals in that interval as the analog system (for example).
Unless you are arguing it is the amount of information transferred at once that creates sentience?
Basically you are arguing it is the complexity alone of the human mind that makes sentience. Which is a troubling position. Because, what with quantum computers only decades away at best, computers are going to rapidly eclipse the human mind in complexity. I don't think that will bring them sentience, however.