Consciousness is just consciousness, it's not reduceable to brain states; it's fundamentally different even though they are associated and related. See Qualia: https://en.wikipedia.org/wiki/Qualia
This alleged fact is not established by any of the arguments summarized in that article. Look into them in detail, and you will find, at root, subtle (and not-so-subtle) question-begging and appeals to plausibility.
