Among the thoughts which analysis brings to light, many can be found which are far removed from the central idea of the dream, and which appear distinguished from the rest as artificial interpolations for a definite purpose. Their purpose may easily be discovered; they are just the ones which establish a connection, often a forced and far-fetched one, between the dream content and the dream thoughts, and if these elements were to be weeded out, not only over-determination but also a sufficient determination by means of the dream thoughts would often be lacking for the dream content.
