14. In simple ideas, either by synonymous terms, or by showing examples.
I. First, when a man makes use of the
name of any simple idea, which he perceives is not understood, or is in danger to be mistaken, he is obliged, by
the laws of ingenuity and the end of speech, to declare his meaning, and make known what idea he makes it stand
for. This, as has been shown, cannot be done by definition: and therefore, when a synonymous word fails to do it,
there is but one of these ways left. First, Sometimes the naming the subject wherein that simple idea is to be
found, will make its name to be understood by those who are acquainted with that subject, and know it by that
name. So to make a countryman understand what feuillemorte colour signifies, it may suffice to tell him, it is the
colour of withered leaves falling in autumn. Secondly, but the only sure way of making known the signification of
the name of any simple idea, is by presenting to his senses that subject which may produce it in his mind, and
make him actually have the idea that word stands for.
