Seems to me there is a difference between 'having a child' and 'making a robot.' Despite the baby-engineering going on in some places in the world, people only beget: Out of something, the same sort of thing. Even if you managed to select all of the best 'learner' genes, you'd still only be passing along what you already had to begin with.
It is true that we do not consciously engineer ourselves, although our DNA contributes to the blueprint for the design of our offspring. The process is quite automated. I don't think that humans are really capable of the engineering feat that millions of years of natural selection has achieved. Our lives are too short to replicate that kind of incremental trial-and-error design.
On the other hand, we do constantly improve our robots. We stick new sensors on them and find interesting ways to get all the machinery to coordinate its activity. Since those machines must communicate with humans and other machines, we are being driven to replicate almost all of the functionality that we find in living beings. And we do have the advantage of studying nature's designs and cribbing from them. There doesn't seem to be any limitation in principle to creating an artificial being that is better than us in almost every function.
How do you give to a 'robot' more than you yourself possess?
The key to more intelligent robots is machine learning. I cannot design a machine that speaks English. But I think that I can design a machine that learns English. That is how we will eventually create artificially intelligent machines--by giving them the ability to learn from their own experiences.
It is an ontology issue. I can't give you ten dollars if I only have five.
However, you might teach me how to earn the extra five dollars. As it happens, I only need five right now, so I'll be pleased to accept it.
