Not downvoting you, but the debate isn't about that. It would be more about "even if you knew all the physical facts about the brain, how those things implement the various algorithms the brain implements, etc, would there still be some aspect of redness that 'transcends' that, an epiphenomenon that one needs ADDITIONAL facts to learn about from the outside?" (well, okay, I guess that isn't exactly true of all flavors of dualism... Since the flavors of dualism that have the dual properties actually have physical effects and so on would be a bit different, but then arguably one could even rephrase that sort of belief so that it's not even a form of dualism anymore, or becomes an epiphenomena style of dualism)