Kant's regulative essentialism and the unknowability of real essences

: In his lectures on Logic and Metaphysics Kant distinguishes between logical and real essences. While the former are related to concepts and are knowable, the latter are related to things and are unknowable. In this paper, I argue that the unknowability is explained by the modal characteristic of real essences as a necessitating ground of which a priori knowledge is impossible. I also show how this claim is related to the unknowable necessity of particular laws of nature. Since laws of nature are conceived as grounded in real essences, the unknowability of the latter is equivalent to Kant’s other claim that there can be no knowledge of the necessity of particular laws of nature. Necessity can only be known a priori, and therefore, the necessity of particular laws is only assumed and conceived as grounded in something unknowable, a real essence. This conclusion will allow me to attribute to Kant a position I label as ‘regulative essentialism’, meaning that real essences have an indispensable role of in accordance with the rational interest to explain nature as a system of laws and natural kinds, combined with an epistemic humility about the correspondence of our empirical concepts to real essences.