HKB
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Often appears with: reason and the intellect · practical postulates · objective reality without intuition · justice as a virtue · fate, destiny, and necessity · categorical imperative · a priori purpose
Usually: argument (1) · detachment (1)
Kant says practical extension requires a priori purposes and the summum bonum, which presupposes theoretical conceptions of freedom, immortality, and God; they gain objective reality only for practical use.
{BOOK*2|CHAPTER*2 ^paragraph 70} In order not to be too abstract, we will answer this question at once in its application to the present case. In order to extend a pure cognition practically, there must be an a priori purpose given, that is, an end as object (of the will), which independently of all theological principle is presented as practically necessary by an imperative which determines the will directly (a cat…