“The problem is not just that when I look at the “Mona Lisa”, my visual experience has a certain quality, no trace of which is to be found by someone looking into my brain. For even if he did observe there a tiny image of the “Mona Lisa”, he would have no reason to identify it with the experience.”

“The problem is not just that when I look at the “Mona Lisa”, my visual experience has a certain quality, no trace of which is to be found by someone looking into my brain. For even if he did observe there a tiny image of the “Mona Lisa”, he would have no reason to identify it with the experience.”

— Thomas Nagel