But I'm working on Strong AI - and I can tell you definitively that while it is very difficult, it is not impossible. Consciousness is only impossible if you don't understand it.
You don't understand it, and even if you did, your strong AI will never ever ever be conscious. It may fool you into not being able to tell if it is conscious or not, but we know it can never be --the same way we know a dead human brain will never ever be conscious again. Consciousness is an effect of living brain. You're not going to get that in a clever subroutine. And if you can't realize that, you have deeper issues. Strong AI is a worthy pursuit, just as is, say, developing fast propulsion.. but those engineers that ultimately build the fastest engine know what the speed limit is... in an ideal sense, light speed. True artificial consciousness is your light speed... you can never quite get there.