Bergeret emphasizes Freud's comments in 1932 on the strangeness of the dream when perceived upon waking. The dreamer when awake regards the "child of the night" as an uncanny and strange product of primitive fantasies. Bergeret is interested in what is behind the more recent and largely oedipal derivatives which may make up the façade of a dream. What is the primitive or primary unconscious? Bergeret argues that the primary unconscious is constituted by instinctual representatives which have never been conscious and consequently cannot be translated into images, while the secondary unconscious is made up of representations which were once conscious and then repressed. A dream is supplied by two sources, the secondary unconscious and the primary unconscious. The latter, which some have regarded as fanciful, mythical, or phylogenetic, is nonetheless theoretically indispensable. Perhaps it is made up of some type of mnemic traces which are not imaginal but which are nonetheless perceptible.