The Hard Problem

Soul Dust
The Magic of Consciousness
Nicholas Humphrey
Princeton University Press, $24.95, 256 pp.

When I discuss the scientific study of human consciousness with my general-education students, I begin by introducing them to a field-monitoring device used by a colleague in Environmental Studies. It stands three feet high and continually records temperature, relative humidity, precipitation, barometric pressure, wind speed and direction, and sun intensity. I ask my students, when it’s raining, does this device know it’s raining? Quickly they recognize that...

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About the Author

Paul K. Johnston teaches American literature at SUNY Plattsburgh.