ABSTRACT
Error theories have been proposed and defended in several different areas of philosophy. In addition to ethics, there are error theories about numbers, color, free will, and personal identity, just to mention a few examples. Error theory about some area of thought and discourse, D, is commonly defined as the view that D involves systematically false beliefs and that, as a consequence, all D-judgments, or some significant subset thereof, are false. That is also how we shall understand the term “error theory” in this chapter. (For a discussion of some non-standard versions of error theory, see Olson Olson: 8–11.) We shall thus take moral error theory to be the view that moral thought and discourse involve systematically false beliefs and that, as a consequence, all moral judgments, or some significant subset thereof, are false.
