Passing to the second, not altogether insignificant, use of these words and distinctions, we sometimes find in the examination of a literary composition such remarks as follow: here is a pleonasm, here an ellipse, there a metaphor, here again a synonym or an equivoke. This means that in one place is an error consisting of using a larger number of words than is necessary (pleonasm); that in another the error arises from too few having been used (ellipse), elsewhere from the use of an unsuitable word (metaphor), or from the use of two words which seem to express two different things, where they really express the same thing (synonym); or that, on the contrary, it arises from having employed one which seems to express the same thing where it expresses two different things (equivoke). This pejorative and pathological use of the terms is, however, more uncommon than the preceding. [Sidenote] _Their use in a sense transcending aesthetic, in the service of science._ Finally, when rhetorical terminology possesses no aesthetic signification similar or analogous to those passed in review, and yet one is aware that it is not void of meaning and designates something that deserves to be noted, it is then used in the service of logic and of science. If it be granted that a concept used in a scientific sense by a given writer is expressed with a definite term, it is natural that other words formed by that writer as used to signify the same concept, or incidentally made use of by him, become, _in respect to_ the vocabulary fixed upon by him as true, metaphors, synecdoches, synonyms, elliptic forms, and the like. We, too, in the course of this treatise, have several times made use of, and intend again to make use of such terms, in order to make clear the sense of the words we employ, or may find employed. But this proceeding, which is of value in the disquisitions of scientific and intellectual criticism, has none whatever in aesthetic criticism. For science there exist appropriate words and metaphors. The same concept may be psychologically formed in various circumstances and therefore be expressed with various intuitions. When the scientific terminology of a given writer has been established, and one of these modes has been fixed as correct, then all other uses of it become improper or tropical. But in the aesthetic fact exist only appropriate words. The same intuition can only be expressed in one way, precisely because it is an intuition and not a concept. [Sidenote] _Rhetoric in the schools._