Above all, a tragic poet will never think of grouping around the chief character in his play secondary characters to serve as simplified copies, so to speak, of the former. The hero of a tragedy represents an individuality unique of its kind. It may be possible to imitate him, but then we shall be passing, whether consciously or not, from the tragic to the comic. No one is like him, because he is like no one. But a remarkable instinct, on the contrary, impels the comic poet, once he has elaborated his central character, to cause other characters, displaying the same general traits, to revolve as satellites round him. Many comedies have either a plural noun or some collective term as their title. "Les Femmes savantes," "Les Precieuses ridicules," "Le Monde ou l'on s'ennuie," etc., represent so many rallying points on the stage adopted by different groups of characters, all belonging to one identical type. It would be interesting to analyse this tendency in comedy. Maybe dramatists have caught a glimpse of a fact recently brought forward by mental pathology, viz. that cranks of the same kind are drawn, by a secret attraction, to seek each other's company. Without precisely coming within the province of medicine, the comic individual, as we have shown, is in some way absentminded, and the transition from absent-mindedness to crankiness is continuous. But there is also another reason. If the comic poet's object is to offer us types, that is to say, characters capable of self-repetition, how can he set about it better than by showing us, in each instance, several different copies of the same model? That is just what the naturalist does in order to define a species. He enumerates and describes its main varieties. This essential difference between tragedy and comedy, the former being concerned with individuals and the latter with classes, is revealed in yet another way. It appears in the first draft of the work. From the outset it is manifested by two radically different methods of observation.