I'm happy to see this article posted here. Many people in technology seem so sure that AI is on some kind of path to singularity, and don't give respect to the deep controversy of that belief. Merely examining how the brain 'works' is missing the point. The nature of consciousness (qualia) that this author is talking about is not the same as the neurobiological machinery that sustains it.
Think about the limit at which the problem of consciousness is falsifyable or measurable. Qualia is whatever is beyond that. Its subjective experience.
From the author:
> Perhaps it’s not surprising that most Deniers deny that they’re Deniers. “Of course, we agree that consciousness or experience exists,” they say—but when they say this they mean something that specifically excludes qualia.