 … is brought about by mentioning several sentences, in which the concept in question, designated by its own word, appears in various combinations. From the comparison of these sentences, the reader is able to abstract which determinate concept the word designates. […] This means is well known as that by which each of us learned the first meanings of words in our mother tongue (Bolzano 1810, II, §8; Bolzano 2004b: 107; our translation).