After dinner, Du Heng sent Du Xuejing and Du Yi out and locked himself in the room to concentrate on studying the problem of Wang Shiyuan's wife.
There were two types of stupor: congenital, where the person was not well-developed in the womb, and acquired, like that of Wang Shiyuan's wife. Acquired stupor was usually caused by emotional stress. If one could think it through, life went on, and time slowly diluted everything. If one couldn't think it through, mild depression could lead to madness or severe cognitive dullness. Wang Shiyuan's wife was a typical case of someone who hadn't been able to think things through and had driven herself mad.
