For many of those below, a rebuttal, and some more meta discussion:

I have made no claims that computers can make flawless decisions. I make no claims they can detect / avoid everything avoidable. I don't know where you're getting the idea that I've said this, unless you're dragging in past battles with other people - everywhere I've claimed computers would do better I've included qualifiers like "likely".

The point I was trying to make is that the instructions of a computer, barring external phenomena which cannot be accounted for, are fully deterministic and accurate. If the high-level decisions are made incorrectly, then the end result will be incorrect, but all down the path everything will be accurately performed.

Not so with humans (just look at someone with epilepsy, or at your own memory), or at least not in the minds of some people, which is the only reason I include it. And, if nothing else, we're far further from accurately simulating an entire human body / neural net than from simulating another computer.