《资治通鉴·汉纪·汉纪二十三》
拿一份平民的上书，陛下认为不错的，投到廷尉那里试看一下反映，廷尉必然说 此话不当说，大为不敬！ 用这种做法测试，就一切都明白了。
取民所上书，陛下之所善，试下之廷尉，廷尉必曰 非所宜言，大不敬， 以此卜之，一矣。
Take a memorial from a commoner, which Your Majesty thinks is good, and submit it to the Court of Imperial Censors to see their reaction. The Court of Imperial Censors will definitely say that "This should not be said, and is very disrespectful!" By testing in this way, everything will be clear.