What does it me an to be literate? What does it mean to be a cognizing individual? What is the nature of cognizing? These are not new questions. They have been treated as "philosophical puzzles" to be pondered systema tically in the hope of some eventual solution. They have also been viewed as sets of "language games" with their own rules to enable the individual to understand the world. These age-old and significant issues gain renewed meaning with our advances in technology and neurosciences. Psychologists and educators would need to be aware of the explicit knowledge needed to prepare...