Besides this he forgot that all a priori deduction, indeed all demonstration in general, must rest upon some necessity, and that all necessity is based on the principle of sufficient reason, because to be necessary, and to follow from given grounds are convertible conceptions.(10) But the principle of sufficient reason is just the universal form of the object as such.
a priori dedukzio oro, baita froga oro ere orokorrean beharrezkotasun batean oinarritzen direla, eta beharrezkotasun oro arrazoiaren printzipioan bakar-bakarrik;