In most universities, candidates must defend their doctoral theses in front of a panel of experts. Therefore, although the candidate should choose an original, manageably narrow topic, he or she must learn everything available about that topic's general area. Moreover, the candidate must be able to recall that information. The student should make careful notes of all research and review those notes from time to time, lest he or she forget the material during the writing process. The candidate should be aware that a writing project that takes several years and fills several hundred pages can overwhelm the brain at the last minute before defense; therefore, the candidate should review the information steadily throughout the years of the development of the thesis.