Mind as computer?

Since the digital computer works by symbol manipulation and since its symbols can be interpreted in terms of a data base, which is often viewed as a partial model of reality, the computer has been taken by many as essentially possessing the capacity to reason. This is the basis of the contemporary mind-as-computer metaphor, which has spread from computer science and cognitive psychology to the culture at large.—George Lakoff, Women, Fire, and Dangerous Things, 7–8