 The distinction between negative and positive experimental moral philosophy is difficult to draw, partly because the negative program often discounts particular classes or types of intuitions in favor of others that are supposed to be more reliable. For example, Singer offers an anti-deontological argument as part of the negative program insofar as his argument uses the emotional origins of deontological intuitions to discount them. But because he then argues for the superiority of consequentialist intuitions, his position also fits within the positive program. So the difference between the two programs is not in the data or the kinds of questions investigated, but in how the data are put to use—whether they are seen as debunking traditional philosophical appeals to intuition or as an addition to traditional philosophical appeals to intuition, by helping philosophers distinguish between reliable and unreliable intuitions and their sources. In the next section, we look at positive uses of intuitions as evidence.