World Without weight

In every domain of reasoning-from time and space, to mental states and physical illness-humans deploy an exceedingly diverse range of intuitive 'theories' about how the world works. So are humans alone in trying to make sense of the world by postulating theoretical entities to explain how the world works?In this important new book, Daniel Povinelli and his colleagues approach this highly controversial territory by investigating the seemingly prosaic topic whether chimpanzees wield roughly the same commonsense ideas about weight that human do. When it comes to the physical world, they ask if chimpanzees reinterpret a broad range of primary experiences-lifting objects, seeing objects fall or collide, observing the differential effort others exert when they move objects-in terms of a common, causal mechanism which, in our everyday parlance, we refer to as 'weight.' The question is not whether chimpanzees have a theory about weight that's any better or worse than preschool children or Einstein or modern string theorists. The question is whether chimpanzees have any theories at all. Povinelli's work encourages us to stand back and adopt a different perspective on even our closest living relatives. Rather than seeing chimpanzees as watered-down versions of ourselves, this book challenges us to see our joint encounter for what it is: a meeting of alien minds.