 Finally, Dan Sperber (2007) argues that even function is continuous between nature and culture. He begins with the observation that what he calls biological artifacts—domesticated plants and animals, for the most part—have both biological and cultural functions. But they carry out their cultural functions in virtue of carrying out their biological functions, and vice versa. Take seedless grapes. Their seedlessness might seem to make them purely artifactual, since the reproductive function of the fruit appears to be lost along with the seeds. But in fact, Sperber argues, the fruit retains the biological function of attracting us to eat the fruit and then spread the plant—not by dispersing seeds, as with seeded grapes, but by propagating the grapevines vegetatively. This coincidence of biological and cultural functions in domesticates shows that far from being the locus of a divide between nature and culture, the realm of domestication is the locus of their imperceptible merger.