  At this stage in the dialectic, the Unnaturalness Argument can be supplemented by considerations of the “yuck factor.” Proponents of the yuck factor argue that the reaction some people experience in contemplating certain acts sometimes suffices for knowing that the act is wrong, even in the absence of satisfactory justification for the reaction (Kass 1998, 687). So proponents of an intrinsic unnaturalness argument can insist that in spite of not being able to provide principled grounds for distinguishing between the two kinds of cases, they still know that creating chimeras is wrong. Again, this conclusion is potentially supported by the literature on moral particularism, which allows that a property’s moral relevance can vary not only from context to context, but also in a way not capturable by a general theory (Dancy 1993).