世界上唯一的诚实答案是世界上有很多有趣的问题，这是不可能确定的。十年后石油价格将是多少？是一个问题。这并不意味着您放弃了试图找到答案。您只是用概率术语来cou缩这个答案。
(There were a great many interesting questions in the world to which the only honest answer was, It's impossible to know for sure. What will the price of oil be in ten years? was such a question. That didn't mean you gave up trying to find an answer; you just couched that answer in probabilistic terms.)