We have yet to articulate a robust scientific explanation of conscious experience. We lack a conclusive account of how consciousness manifests a private world of sights and sounds and sensations. We cannot yet respond, or at least not with full force, to assertions that consciousness stands outside conventional science. The gap is unlikely to be filled anytime soon. Most everyone who has thought about thinking realizes that cracking consciousness, explaining our inner worlds in purely scientific terms, poses one of our most formidable challenges.
