This book re-examines the old debate about the relationship between rationality and literacy. Does writing "restructure consciousness?" Do preliterate societies have a different "mind-set" from literate societies? Is reason "built in" to the way we think? How is literacy related to numeracy? Is the "logical form" that Western philosophers recognize anything more than an extrapolation from the structure of the written sentence? Is logic, as developed formally in Western education, intrinsically beyond the reach of the preliterate mind? What light, if any, do the findings of contemporary...