Strong AI is possible, guaranteed. You're one example of it. The word "artificial" is utterly misleading. All it really says is "we know it exists in animals, and we choose to call any other example artificial, even if we're emulating the biological example."
There's nothing magical about the brain or brainops, superstition notwithstanding. It's just physics like everything else. Technology will get there, it's as inevitable as any other technology already invented, only more so, due to the immense potential for advancement on every front.
Presuming, of course, that we don't destroy ourselves before we get there. Sigh.