A great many witticisms in circulation reach a certain age or rather go through a course composed of a flourishing season and a mature season, and then sink into complete oblivion. The need that people feel to draw pleasure from their mental processes continually creates new witticisms which are supported by current interests of the day. The vitality of actual witticisms is not their own, it is borrowed by way of allusion from those other interests, the expiration of which determines the fate of the witticism. The factor of actuality which may be added as a transitory pleasure-source of wit, although it is productive in itself, cannot be simply put on the same basis as the rediscovery of the familiar. It is much more a question of a special qualification of the familiar which must be aided by the quality of freshness and recency and which has not been affected by forgetfulness. In the formation of the dream one also finds that there is a special preference for what is recent, and one cannot refrain from inferring that the association with what is recent is rewarded or facilitated by a special pleasure premium. Unification, which is really nothing more than repetition in the sphere of mental association instead of in material, has been accorded an especial recognition as a pleasure-source of wit by G. Th. Fechner.[47] He says: “In my opinion the principle of uniform connection of the manifold, plays the most important rôle in the field under discussion; it needs, however, the support of subsidiary determinations in order to drive across the threshold the pleasure with its peculiar character which the cases here belonging can furnish.”[48] In all of these cases of repetition of the same association or of the same word-material, of refinding the familiar and recent, we surely cannot be prevented from referring the pleasure thereby experienced to the economy in psychic expenditure; providing that this viewpoint proves fertile for the explanation of single facts as well as for bringing to light new generalities. We are fully conscious of the fact that we have yet to make clear the manner in which this economy results and also the meaning of the expression “psychic expenditure.” The third group of the technique of wit, mostly thought-wit, which includes false logic, displacement, absurdity, representation through the opposite, and other varieties, may seem at first sight to present special features and to be unrelated to the techniques of the discovery of the familiar, or the replacing of object-associations by word-associations. But it will not be difficult to demonstrate that this group, too, shows an economy or facilitation of psychic expenditure.