不置可否 [- - kě fǒu]not to say yes or no; be noncommittal; decline to comment; hedge; indicate neither consent nor dissent; make no comment; not to express an [any] opinion; not to give a definite answer; refrain from making known one's attitude; refuse to comment; say neither buff nor style; show neither approval nor disapproval; without giving an affirmative or negative answer; without remark:•¶ 那位老人不置可否地淡淡一笑， 就转身走了。 The old man smiled noncommittally， then turn and go away.
•¶ 你是负责人， 你怎么能对这个问题不置可否？ You are in charge of the job. How could you evade the issue?