《资治通鉴·唐纪·唐纪十八》
如借机泄私怨是事实，应当依法论罪；否则，袁思古提的谥号按理是不应更改的。 
若嫌隙有实，当据法推绳；如其不然，义不可夺。 
If it is true that he seized the opportunity to take revenge for a personal grudge, he should be punished according to the law. On the other hand, if this is not the case, Yuan Sigu's proposed posthumous name should not be changed.
<s>[INST] Identify the key themes in this Classical Chinese text and explain them in English: 若嫌隙有实，当据法推绳；如其不然，义不可夺。  [/INST] If it is true that he seized the opportunity to take revenge for a personal grudge, he should be punished according to the law. On the other hand, if this is not the case, Yuan Sigu's proposed posthumous name should not be changed.</s>
Identify the key themes in this Classical Chinese text and explain them in English: 若嫌隙有实，当据法推绳；如其不然，义不可夺。
user
If it is true that he seized the opportunity to take revenge for a personal grudge, he should be punished according to the law. On the other hand, if this is not the case, Yuan Sigu's proposed posthumous name should not be changed.
assistant