4. Every mixed mode consisting of many distinct simple ideas, it seems reasonable to inquire, Whence it has its unity; and how such a precise multitude comes to make but one idea; since that combination does not always exist together in nature?
4. Modu misto oro ideia bakun askoz osatua denez gero, arrazoizko dela dirudi galdetzea nondik datorren haren batasuna eta nola gertatzen den ideia konkretu askok eta hain zehatzek ideia bakarra egitea, sarri askotan konbinaketa horiek ez baitira naturan bat eginda existitzen.