I think you're reading some arguments I'm not making. The author seems to be of the opinion that even with infinite resources it's outright impossible to have a computer that thinks or experiences consciousness, which is obviously a philosophical, not practical, argument, and I don't agree. I'm not saying we should actually try it, or that it's doable with our current or foreseeable resources.

That being said, I am defining it. I'm saying that even if we assume that it's utterly impossible to have consciousness any other way, it's some incredibly unique combination of the things that make us human and literally any deviation whatsoever makes it all fall apart, there still seems to be a possible path to a computer with consciousness via simulation of that particular and special process. That's my thing you don't think I can define: a physics simulation of sufficient fidelity to simulate a thing we already know demonstrates consciousness. "There aren't enough resources in the universe" would block that path, sure, but that's not very interesting. Lots of other things could block that path, it's an insane path to an incredibly difficult goal. But saying "artificial consciousness is impossible, period" means something is blocking it, and the idea that it's some law of physics that is both crucial to consciousness and can't be simulated is interesting. I'm struggling to imagine how that would be possible, and if it's a failure of my imagination I'd like to know. The universe doesn't have to be computable or deterministic to make a simulation that imitates it so well that observations of the real and simulated physics yield indistinguishable results, and at that point I don't see anything inherently preventing consciousness.