 Strong conventionalism, however, goes on to deny even that conventionalism is forced upon us simply by ignorance. It denies that there are any such natural divisions, known or unknown. Strong conventionalists claim that the differences and similarities that we attribute to things exist in virtue of, for example, the social function of the relevant concepts rather than in natural facts. For example, the concept of gender is used to mark a distinction of social role. The conventionalist treats natural kinds in the same way. The chemical elements, biological species, quarks, neutrinos and bosons are equally constructed by the activity of scientists. The key claim is that natural kinds are constructed rather than discovered. As Woolgar claims “there is no object beyond discourse” (1988, 73).