General first principles of philosophy cannot be applied to the practical world because their application requires criteria of judgment that do not exist.

After participating in the pantheism controversy, Rehberg made his mark in other philosophical controversies of his day. In the early 1790s he wrote several reviews for the Allgemeine Literatur Zeitung of Karl Leonhard Reinhold's Elementarphilosophie, which had been at the centre stage of the new debates surrounding Kant's critical philosophy.[27] Reinhold's Elementarphilosophie was a radical form of foundationalism, whose basic aim was to derive all the results of Kant's philosophy from a si