D E MORGAN 1 said that, " if all mankind had spoken one language, we cannot doubt that there would have been a powerful, perhaps universal, school of philosophers who would have believed in the inherent connexion between names and things ; who would have taken the sound man to be the mode of agitating the air which is essentially communicative of the ideas of reason, cookery, bipedality, etc. . . . ' The French/ said the sailor, ' call a cabbage a shoe ; the fools ! Why can't they call it a cabbage, when they must know it is one ? ' "

One of the chief differences between logicians and men of letters is that the latter mean many different things by one word, whereas the former do not-at least nowadays. Most mathematicians belong to the class of men of letters.