 Despite these apparent advantages, most philosophers reject this proposal. As Elliott Sober (1988; 2000) points out, when speaking about a particular trait in a particular organism – such as the reader’s own height – it makes no sense to ask how much of that individual trait was determined by genes and how much by the environment. All traits require both genetic and environmental factors for their development. Thus, one cannot isolate these causal factors in a way that would allow for the comparison of their relative phenotypic contributions. We cannot ask, for example, how an organism would develop in an “environmental vacuum” because it would not develop at all. Sober further notes that genetic and environmental contributions are incommensurable. If you are six feet tall, we cannot sensibly ask how much of your height came from your genes and how much came from your environment. There are no “height particles” produced by both genes and environments that add up to determine your height (Sober 1988). Genes and environment both make contributions, but not contributions that can be taken apart and then weighed separately. Yet the folk concept of innateness clearly applies to particular traits in particular individuals: Donald Trump’s eyes are innately grey-blue but his skin is not innately orange. Such statements cannot be meaningfully translated into statements about the relative contributions of genes end environment to Trump’s eyes or Trump’s skin.