and the other supposed (with a like ignorance of what it is) to be the SUBSTRATUM to those operations we experiment in ourselves within.
izan ere, bata (zer den jakin gabe) kanpotik hartzen ditugun ideia bakunen substratuma dela suposatzen dugu eta bestea (antzerako ezjakitez) geure barruan izaten ditugun eragiketen substratuma dela.