He's saying they're doing great work but they forget this one little thing: you cannot reconcile rhetoric and grammar.

他说的是，他们做得非常好,但是他们忘记了一个小问题，修辞和语法是不可能和解的。

耶鲁公开课 - 文学理论导论课程节选

Also, it can be a rhetorical question or a question that does not want to be answered.

当然，这也可以用在问一种修辞的问题，或一种不需要回答的问题。

How can I 课堂 - SpeakingMax英语口语达人

It can be a rhetorical question or a real question.

它可以是修辞意义上的问句，也可以是一个真实的问题。

How can I 课堂 - SpeakingMax英语口语达人