Not sure I agree with your interpretation, given that Nagel writes: >But fundamentally an organism has conscious mental states if and only if there is somethin

Not sure I agree with your interpretation, given that Nagel writes: >But fundamentally an organism has conscious mental states if and only if there is something that it is to be that organism — something it is like for the organism. The last part ("something it is like for the bat") seems to contradict the idea that it is only about comparing the bat's experience to the human's.