The third session involved writing out by memory entire portions of the Seven Military Classics, but only three of the classics were ever used, those being "The Methods of the Sima", the "Wuzi", and "The Art of War". Even just memorizing the reduced portion of the classics was too difficult for most military examinees, who resorted to cheating and bringing with them miniature books to copy, a behavior the examiners let slide owing to the greater weighting of the first two sessions. In some cases the examinees still made mistakes while copying the text word for word. The contents of the military exam were largely the same at the prefectural, provincial, metropolitan, and palace levels, with the only difference being tougher grading.