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The psychology professor Richard Aslin once commented to me that he felt the idea of “consciousness” was a proxy for a whole host of variables correlated with our mental lives. We use “consciousness” as shorthand to easily describe the functions of a multitude of inborn, instinctual mechanisms such as language, perception, and emotion. It becomes evident that consciousness is best understood as a complex instinct as well. All of us come with a bucketful of instincts. Our incessant thought pattern jumps around. We have feelings about one idea, then its opposite, then our family, then an itch, then a favorite tune, then the upcoming meeting, then the grocery list, then the irritating colleague, then the Red Sox, then … It goes on and on until we learn, almost against our natural being, to have a linear thought.
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Michael S. Gazzaniga (The Consciousness Instinct: Unraveling the Mystery of How the Brain Makes the Mind)