So, I work in AI research (as a research engineer though, not a scientist). I've also studied philosophy and I'm a vegan. Yes yes, insert "they will tell you" joke here, but I promise it's actually relevant this time.

First, while I studied philosophy one of the things that stuck with me the most, was the discussion of "souls": humans have souls, animals don't. For centuries the specifics of souls were discussed: people would be weighed while they died, in an effort to measure the approximate weight of a soul as it departed the body. Discussions about how many souls (or angels) could dance on the tip of a needle. Many people still believe in souls, but it's very hard to have a real discussion about them because by definition they do not "interact" with this world in a way that can be measured.

When discussing whether it's okay to harm animals for food or sport, one other argument I hear quite often (other than having no souls) is that animals do not experience "qualia": basically the smallest unit of "subjective experience". People know that they themselves experience qualia: the sensation of touching a doorknob, the taste of fresh fruit, the sense of beauty watching a rainbow. Ironically, they would say that animals are like robots: just (biological) machines acting on instinct, and feeling any kind of compassion for them means you are anthropomorphizing.

Subjective experience (or at least qualia) and souls both have one thing in common: they can not be measured externally in a meaningful way. You can simply state that an AI system no matter how advanced, has no soul and has no subjective experience. And that's pretty much that. There's no meaningful discussion to be had about it, because no matter what an AI might tell you: it has no way to prove it to you. In fact, you can't even be certain that anyone other than yourself has subjective experiences: you assume that because they are humans like you, and you experience them, that they probably do as well. They tell you that they do. But a human without subjective experience, someone on "autopilot", would be absolutely indistinguishable from a human who does have them.

But perhaps I am conflating here whether experience can be "measured", with whether a system even allows experience in the first place regardless of whether it can be measured. I think that Dreyfus and others argue that in order to have any "experiences" at all, you simply must have a body in the real world, and you must care about that body. Please correct me if that's the wrong interpretation, I haven't actually read the book. That argument would be harder for me to discuss, because I personally believe that consciousness will "emerge" from a complex interaction of relatively simple systems - but that's also just a theory. I don't believe that experience is literally impossible to engineer, as consciousness has emerged from non-conscious being through evolution, so clearly there must be some kind of mechanism for it -- and if there is, then I believe it can be replicated, we just don't really understand it well enough yet to do so. And with how AI tech is going, I think that we're more likely to accidentally stumble upon it than we are to get these deliberately.