Till he has some ideas of his own, he cannot suppose them to correspond with the conceptions of another man; nor can he use any signs for them: for thus they would be the signs of he knows not what, which is in truth to be the signs of nothing.
Bere kabuzko ideiaren bat eduki artean, ezin du suposatu zenbait ideia beste gizaki baten ideiekin bat datozenik, ez eta haiek adierazteko ezein zeinu erabili ere, hau berak ezagutzen ez duen zerbaiten zeinuak erabiltzea litzatekeelako, hau da, egiatan ezeren zeinurik ez erabiltzea.