Even as the Internet has revived hope of a universal library and Google seems to promise an answer to every query, books have remained a dark region in the universe of information. We want books to be as accessible and searchable as the Web. On the other hand, we still want them to be books.
Our experience in fooling around with the genes of mice has taught us that many of the traits that interest us are not definite products of specific mutations but emergent phenomena arising from extremely complex interactions between genes, environment, and life experience.
SuperMemo is based on the insight that there is an ideal moment to practice what you've learned. Practice too soon and you waste your time. Practice too late and you've forgotten the material and have to relearn it. The right time to practice is just at the moment you're about to forget.