There have been some confirmed contradictions between the historical materials belonging to the san Senke and fact, such as the case in which the person with a congenital leg impairment was Shoan in reality whereas in a san-Senke material it was replaced as Doan.
少庵は先天的に足に不自由があったが、これが三千家系統の資料では道安に置き換えるなどの事実関係の齟齬も確認されている。