"A thesis should take no more than three years because, if the student has failed to delimit his topic and find the necessary sources after this period, he has one of the following problems: 1. The student has chosen an overwhelming topic that is beyond his skill level. 2. The student is one of those insatiable persons who would like to write about everything, and who will continue to work on his thesis for 20 years. (A clever scholar will instead set limits, however modest, and produce something definitive within those limits.) 3. The "thesis neurosis" has begun: the student abandons the thesis, returns to it, feels unfulfilled, loses focus, and uses his thesis as an alibi to avoid other challenges in his life that he is too cowardly to address. This student will never graduate."