    Merging expressivism and non-cognitivism could be a good idea, so long as the following difference is still made clear.  (I may be mistaken on this point, and if so ignore me, but feel fairly certain about it.)  Non-cognitivism is a negative claim about moral statements (or at least a significant subset of them - see Ayer's four types of moral statements).  It claims that they are not alethic/factual in nature.  However, expressivism is a related but separate claim that moral statements, while not alethic/factual, do express something nevertheless.  One could be a non-cognitivist without being an expressivist by holding that moral statements are nonsensical and express nothing whatsoever.  However, it just so happens, that non-cognitivist tend to be expressivists.  -  3 October 2008