The only scientific viewpoint is that we do not know whether or not strong AI is possible. Materialists think it probably is, since they can't see any reason why not. But we don't understand intelligence so we don't know if we are missing something. Meanwhile, there are plenty of reasonable reasons not to be a materialist.
As a meta-comment, I find the condescension in your comment unnecessary. Why is he "spewing" and why is it "quackery"? Did he not publish a testable, falsifiable theory? Isn't that what science is?
"Strong AI" is completely meaningless. Strong AI = whatever isn't human basically. The actual argument that "Strong AI" is meant to support is this: You can't create a Strong AI because Strong AIs can only exist in intelligent beings and computers aren't intelligent, therefore computer scientists are wasting their time. https://en.wikipedia.org/wiki/Chinese_room
I don't get it. Strong AI is just a model of the mind that is indistinguishable or better than the original model.
Think of it this way. If you were to do a double scale, full 3D model of earth, with all pieces intact wouldn't it just be a bigger earth on which you could live and do stuff?
As a meta-comment, I find the condescension in your comment unnecessary. Why is he "spewing" and why is it "quackery"? Did he not publish a testable, falsifiable theory? Isn't that what science is?