There's lots of ways to implement something as simple as addition, but how many ways are there to implement a man? Curently, the slightest mutation can cause a miscarriage, and a few molecules of poison can kill a man, that's how sensitive the implementation is.

What is the math on this? As the complexity of a thing goes up, surely the number of ways to implement it goes down (given each building block has a limited number ways of combining)? To the point where with something as complex as man, the way he is is the only way he can be. i.e. artificial man is impossible.

I know the claim was that morality was implementation-independent, but I am just bothered by the idea that there *can be* multiple implementations of John.