Secretary Clinton says the process of getting Iran to submit to inspections and to get rid of its enriched uranium is not "finished until it's finished" and that it is not clear whether the Iranian government is sincere about wanting to resolve the dispute.

VOA: standard.2009.10.06

One of the reasons for thinking it's not clear whether the argument fails or not is because it's hard to pin down, where exactly did it go wrong?

并不能确定这个论证是否成立,的其中一个原因就是,我们很难确定,到底是哪里出了问题

耶鲁公开课 - 死亡课程节选

One of the reasons for thinking it's not clear whether the argument fails or not is because it's hard to pin down, where exactly did it go wrong?

并不能确定这个论证是否成立,的其中一个原因就是,我们很难确定,到底是哪里出了问题

耶鲁公开课 - 死亡课程节选