《史记·十二本纪·五帝本纪》
丹朱么，他这个人愚顽、凶恶，不能用。 
顽凶，不用。 
Tan Zhu, he is foolish, fierce, and can't be used. 
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 顽凶，不用。  [/INST] Tan Zhu, he is foolish, fierce, and can't be used. </s>
Identify the key themes in this Classical Chinese text and explain them in English: 顽凶，不用。
user
Tan Zhu, he is foolish, fierce, and can't be used.
assistant