I’m fully in the physicalist camp. I think this is a flawed thought experiment because humans are incapable of knowing everything about seeing red until they a

I’m fully in the physicalist camp. I think this is a flawed thought experiment because humans are incapable of knowing everything about seeing red until they actually experience it. Here’s what it’d like be if we actually could without experience: Suppose you take a perfect snapshot and learn the exact position of all atoms in a persons brain after they see a red apple. Now imagine that humans have the ability to move all the atoms in our brain to be in those exact same positions, at will. So without the red photo receptors in your eye actually detecting anything red, you can make yourself see red apples at anytime. Mary could do this even before ever actually seeing red or even when seeing something that’s reflecting a completely different color to her eyes. Since we don’t have this magical ability, having an understanding of all the underlying physics and biochemistry of color perception does not really provide everything there is to know about seeing red.