George Johnson reviews I am a Strange Loop by Douglas R. Hofstadter, in Scientific American:
“You make decisions, take actions, affect the world, receive feedback from the world, incorporate it into yourself, then the updated ‘you’ makes more decisions, and so forth, round and round,” Hofstadter writes. What blossoms from the Gödelian vortex–this symbol system with the power to represent itself–is the “anatomically invisible, terribly murky thing called I.” A self, or, to use the name he favors, a soul.
It need know nothing of neurons. Sealed off from the biological substrate, the actors in the internal drama are not things like “serotonin” or “synapse” or even “cerebrum,” “hippocampus” or “cerebellum” but abstractions with names like “love,” “jealousy,” “hope” and “regret.”
And that is what leads to the grand illusion. “In the soft, ethereal, neurology-free world of these players,” the author writes, “the typical human brain perceives its very own ‘I’ as a pusher and a mover, never entertaining for a moment the idea that its star player might merely be a useful shorthand standing for a myriad infinitesimal entities and the invisible chemical transactions taking place among them.”