Go Sasaki

The traditional debate over theories of reference of natural kind terms faces a serious dilemma. On the one hand, although direct reference theory, or the causal–historical analysis of reference to natural kinds, is still highly influential in the philosophy of language, there is a notorious “qua” problem: direct reference theory cannot uniquely determine the referents of natural kind terms. On the other hand, the standard descriptivism does not accommodate our externalist intuition. We propose temporal externalist descriptivism, where relevant future theorists determine references by past speakers. This position makes the externalist intuition about reference compatible with descriptivism about natural kind terms by ensuring the possibility of mistakes in the past and present practice. It also provides a defense of the controversial claim of temporal externalism based on a descriptivist analysis of reference. While causal–historical analysis focuses on inheritance through history, a reference has both a past and a future. In this sense, reference to natural kinds is essentially a provisional phenomenon.