 Quine (1960) articulated the claim that differentiation of the world into objects occurs only with the acquisition of language and with the conceptual apparatus of identity and quantification. Soja et al.(1991) have provided experimental evidence that might empirically refute Quine’s view. Moreover, research results in primates, such as those presented in Phillips and Santos (2007), and Mendes et al.(2008), provide additional empirical support against Quine’s claim. Nonetheless, a weaker version of Quine’s view has found empirical backing in Imai and Genter (1997) and Yoshida and Smith (2003), as far as quantitative differences are concerned. Also, Xu (2002) has argued that linguistic labels may play a role (in 9-months-old infants) in the acquisition of sortal concepts in infancy.