Michael Pelczar

Properly understood, content internalism is the thesis that any difference between the representational contents of two individuals' mental states reduces to a difference in those individuals' intrinsic properties. Some of the strongest arguments against internalism turn on the possibility for two "doppelgangers" –- perfect physical and phenomenal duplicates -– to differ with respect to the contents of those of their mental states that they can express using terms such as "I," "here," and "now." In this paper, I grant the stated possibility, but deny that it poses any threat to internalism. Despite their similarities, doppelgangers differ in some of their intrinsic properties, and it is to such intrinsic differences that differences of indexical content reduce.

Someone who knew everything about the world’s physical nature could, apparently, suffer from ignorance about various aspects of conscious experience. Someone who knew everything about the world’s physical and mental nature could, apparently, suffer from moral ignorance. Does it follow that there are ways the world is, over and above the way it is physically or psychophysically? This paper defends a negative answer, based on a distinction between knowing the fact that p and knowing that p. This distinction is made intelligible by reference to criterial connections between the possession of moral or phenomenal knowledge, and the satisfaction of cognitively neutral conditions of desire and experiential history. The existence of such connections in the moral case makes for an efficient dissolution of the so-called moral problem.