Adapted fromLogic: Inductive and Deductiveby William Minto (1915)

We cannot inquire far into the meaning of proverbs or traditional sayings without discovering that the common understanding of general and abstract names is loose and uncertain. Common speech is a quicksand.

Consider how we acquire our vocabulary, how we pick up the words that we use from our neighbors and from books, and why this is so soon becomes apparent. Theoretically, we know the full meaning of a name when we know all the attributes that it connotes, and we are not justified in extending it except to objects that possess all the attributes. This is the logical ideal, but between theought to beof Logic and theisof practical life, there is a vast difference. How seldom do we conceive words in their full meaning! And who is to instruct us in the full meaning? It is not as in the exact sciences, where we start with knowledge of the full meaning. In Geometry, for example, we learn the definitions of the words used, "point," "line," "parallel," etc., before we proceed to use them. But in common speech, we hear the words applied to individual objects; we utter them in the same connection; we extend them to other objects that strike us as like without knowing the precise points of likeness that the convention of common speech includes. The more exact meaning we learn by gradual induction from individual cases. The individual's extension of the name proceeds upon what in the objects has most impressed him when he caught the word: this may differ in different individuals; the usage of neighbors corrects individual eccentricities. The child in arms shouts "Da" at the passing stranger who reminds him of his father; for him at first it is a general name applicable to every man; by degrees he learns that for him it is a singular name.

It is obvious that to avoid error and confusion, the meaning or connotation of names, the concepts, should somehow be fixed; names cannot otherwise have an identical reference in human intercourse. We may call this ideal fixed concept the Logical Concept. But in actual speech we have also the Personal Concept, which varies more or less with the individual user, and the Popular or Vernacular Concept, which, though roughly fixed, varies from social sect to social sect and from generation to generation.

When we come to words of which the logical concept is a complex relation, an obscure or intangible attribute, the defects of the popular conception and its tendencies to change and confusion are of the greatest practical importance. Take such words as "monarchy," "civil freedom," "landlord," “culture.” Not merely should we find it difficult to give an analytic definition of such words; we might be unable to do so, and yet flatter ourselves that we had a clear understanding of their meaning.

It was with reference to this state of things that Hegel formulated his paradox that the true abstract thinker is the plain man who laughs at philosophy as what he calls abstract and unpractical. He holds decided opinions for or against this or the other abstraction, "freedom," "tyranny," "revolution," "reform," "socialism," but what these words mean and within what limits the things signified are desirable or undesirable, he is in too great a hurry to pause and consider.

The disadvantages of this kind of "abstract" thinking are obvious. The accumulated wisdom of mankind is stored in language. Until we have cleared our conceptions, and penetrated to the full meaning of words, that wisdom is a sealed book to us. Wise maxims are interpreted by us hastily in accordance with our own narrow conceptions. All the vocabulary of a language may be more or less familiar to us, and yet we may not have learnt it as an instrument of thought.