11. Thirdly, it is not enough that men have ideas, determined ideas, for which they make these signs stand; but they must also take care to apply their words as near as may be to such ideas as common use has annexed them to.
11. Hirugarrenik, ez da nahikoa gizakiek ideiak, ideia zehaztuak, edukitzea eta zeinu horiez ordezkatzea, beste ardura hau ere hartu behar baitute, alegia, euren hitzak erabilera komunak hitzoi erantsitako ideiei ahalik zehazkien aplikatzekoa.