Harris: The Mystery of Consciousness

From Sam Harris, an overview of ideas about consciousness.

Even if I happen to be a brain in a vat at this moment—all my memories are false; all my perceptions are of a world that does not exist—the fact that I am having an experience is indisputable (to me, at least).  This is all that is required for me (or any other conscious being) to fully establish the reality of consciousness. Consciousness is the one thing in this universe that cannot be an illusion.⁠