Fig. 3. The relation between consciousness and the physical structures of a hypothetical sentient computer. If we assume that the computer is conscious, then both the contents of the computer's consciousness and the physical hardware of the computer are real. However, the contents of consciousness can correspond only to higher-order abstract properties of this hardware. These properties are represented within the tinted section by a hierarchy of symbolic descriptions. Such properties exist only in an abstract sense-they are not actually present in the physical hardware of the computer.
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