ISBN: 9780262354424 | 280 pp. | September 2019


The Feeling of Life Itself

Why Consciousness Is Widespread but Can't Be Computed

In The Feeling of Life Itself, Christof Koch offers a straightforward definition of consciousness as any subjective experience, from the most mundane to the most exalted—the feeling of being alive. 

Psychologists study which cognitive operations underpin a given conscious perception. Neuroscientists track the neural correlates of consciousness in the brain, the organ of the mind. But why the brain and not, say, the liver? How can the brain, three pounds of highly excitable matter, a piece of furniture in the universe, subject to the same laws of physics as any other piece, give rise to subjective experience? Koch argues that what is needed to answer these questions is a quantitative theory that starts with experience and proceeds to the brain. In The Feeling of Life Itself, Koch outlines such a theory, based on integrated information.


Koch describes how the theory explains many facts about the neurology of consciousness and how it has been used to build a clinically useful consciousness meter. The theory predicts that many, and perhaps all, animals experience the sights and sounds of life; consciousness is much more widespread than conventionally assumed. Contrary to received wisdom, however, Koch argues that programmable computers will not have consciousness. Even a perfect software model of the brain is not conscious. Its simulation is fake consciousness. Consciousness is not a special type of computation—it is not a clever hack. Consciousness is about being.

Table of Contents

  1. Preface: Consciousness Redux
  2. Acknowledgments
  3. 1. What Is Consciousness?
  4. 2. Who Is Conscious?
  5. 3. Animal Consciousness
  6. 4. Consciousness and the Rest
  7. 5. Consciousness and the Brain
  8. 6. Tracking the Footprints of Consciousness
  9. 7. Why We Need a Theory of Consciousness
  10. 8. Of Wholes
  11. 9. Tools to Measure Consciousness
  12. 10. The Über-Mind and Pure Consciousness
  13. 11. Does Consciousness Have a Function?
  14. 12. Consciousness and Computationalism
  15. 13. Why Computers Can’t Experience
  16. 14. Is Consciousness Everywhere?
  17. Coda: Why This Matters
  18. Notes
  19. References
  20. Index