George, you say:
"How do we defined what is "human" if non-human machines (and species for that matter) share in consciousness, feelings, empathy, desire .... What makes us human?
That's an interesting question, which is at the heart of a (part memoir, part speculative fiction, I guess) novel I'm just about to publish. (It's aimed at the 18-24 year old crowd, so maybe not that interesting to folks like us!) My own answer is that, as with everything in reality, the math is naturally fuzzy, but that the intention behind the question is where things matter most. What is the answer going to be used to decide? If we're talking about rights, then the answer it mostly irrelevant, and the real question is going to be more about what things do the individuals involved (animal, vegetable, or mineral) need to function as well as possible, so that they are able to contribute their best possible selves (as designed) to the world (and beyond!)? Those needs, for healthy functionality, are their "rights". Human, or otherwise.