The Dead Philosophers' Cafe: An Exchange of Letters for Children and AdultsEleven year old Nora K. received Jostein Gaarder's Sophie's World as a birthday present, and in it, she read about Plato's theory of ideas. One problem especially intrigued her: What about the platonic idea of the dinosaur? Ideas are timeless and cannot die. The dinosaurs, however, became extinct ages ago. Does the idea of the dinosaur still exist all the same? Could it even be that the material world is a dream and time an illusion? Moreover, is