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Yeah, we have to assume that the Matrix evolved out of code that humans wrote. This type of code right here before us, perhaps. Decentralized blockchain stuff, or EOS type code.

And like all robots in play today, there's almost always a human element, ensuring that everything is in order, because robots aren't perfect.

Robots might need programmed instructions, which although can be sharply clear, might lack that sense of drive, purpose, and fuzzy consciousness humans have, so if a screw was to fall down a grate, even though the robot might find it difficult to comprehend how to pick it up, they could employ a human brain to write new instructions for the machine, even the if the human isn't aware of this.

Just speculating. =3

Funny, I was having a conversation earlier with a friend of mine about the singularity, and malevolent vs benevolent computers.

My take on it is very similar to what you've just described. Ultimately, all machinery is human, simply because humans programmed it. In the same way if we met aliens from Alpha Centurai and they showed us their computers, we would say they were alien machines.

Cg