demonstrate them; unless we wish to depart entirely from the proper meaning of this word, according to which to demonstrate (ostendere, exhibere) is equivalent to presenting a concept in intuition (whether in proof or merely in definition).

If the intuition is a priori this is called construction; but if it is empirical, then the Object is displayed by means of which objective reality is assured to the concept. Thus we say of an anatomist that he demonstrates the human eye, if by a dissection of this organ he makes intuitively evident the concept which he has previously treated discursively.

It hence follows that the rational concept of the supersensible substrate of all phenomena in general, or even of that which must be placed at the basis of