Sistematicita e finalita. La "deduzione trascendentale" delle idee e il Principio del Giudizio

The aim of this essay is to address the relationship between two transcendental deductions: that of the ideas in the Appendix to the Critique of Pure Reason and that of purposiveness in the introduction to the Critique of the Power of Judgment. The first deduction aims to justify a certain use of the ideas (namely the regulative use of reason), while the second aims to find a principle that could guide the power of judgment. The argument is that the principle seemingly missing in the first deduction, namely a transcendental principle on which the logical principle of the systematicity depends, is that of purposiveness. In the rethinking of the roles of the faculties and the introduction of the power of judgment lies a new conception of this principle and, in order to “bring the entire critical enterprise to an end”, a primacy of the purposiveness over systematicity.