《三国志·魏书·荀彧攸贾诩传》
贾诩说： 我刚才在思考事情，所以没有立刻回答罢了。 太祖说： 思考什么？ 
诩曰： 属適有所思，故不即对耳。 太祖曰： 何思？ 
Jia Xu said: I was just thinking about something, so I didn't answer immediately. The Emperor said: What are you thinking about?