Concept
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A History of Theories of Consciousness
![Freud's levels of consciousness](../../../../../../../../../figures.boundless-cdn.com/29792/full/496px-structural-iceberg.jpg.jpg)
Freud's levels of consciousness
This figure illustrates the respective levels of the id, ego, and superego. The part above water is known as the conscious level; the top level of waves just below the surface and above the white line is the preconscious level; and the bottom level is the unconscious.
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"Structural-Iceberg."
http://en.wikipedia.org/wiki/File:Structural-Iceberg.svg
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