This takes place because appearances, as mere intuitions, occupying a part of space and time, come under the concept of Quantity, which unites their multiplicity a priori according to rules synthetically.
Hauen arrazoia da, ezen fenomenoak, espazio eta denboraren zati bat hartzen duten intuizio soil direnez, tamainaren kontzeptupean daudela eta horrek bateratzen duela a priori horien aniztasuna, erregela sintetiko batzuen eredura;