  Any argument to that effect raises general questions about what it takes for a belief to constitute knowledge or to be justified. Nevertheless, those who put forward skeptical arguments from moral disagreement do not always invoke any such general view. The reason might be that they believe that the skeptical conclusions follow on just about any of the most promising theories that have emerged in epistemology, which obviously would make the arguments less vulnerable (see e.g., Tolhurst 1987 for this suggestion). However, others do explicitly state some general view of knowledge or justification on which they rely.