Science aims tell us something about nearly everything, from the atoms in our cells to the motions of the stars. It assumes that knowledge is good for its own sake, and therefore takes as its sole purpose the acquisition of knowledge. But shouldn’t knowledge serve practical and ethical concerns, like ending conflict and feeding the hungry? Could some knowledge be interesting, but ultimately irrelevant? And isn’t there some knowledge we might be better off without, such as how to build nuclear weapons? John and Ken test their claims with UC Berkeley anthropologist Paul Rabinow. This program was recorded live at the Marsh Theater in San Francisco.