Only in order to have any presentiment of this paralogism (for without such a provisional conjecture one would hardly have any suspicion of the proot), it is always necessary to have at hand an enduring criterion of the possibility of such synthetic propositions, which prove more than experience can yield, which criterion con sists in the fact that the proof leads to the required predicate not directly but only by means of a principled of the possibility of expandKenntnis Object imersteren Verstande Princips