宋代教育家朱熹说:“读书无疑者,须教有疑。有疑者无疑,至此方为上进。”在西方哲学史上也有这样一个著名的故事:在剑桥大学,维特根斯坦是大哲学家穆尔的学生,有一天,大哲学家罗素问穆尔:“谁是你最好的学生?”穆尔毫不犹豫地回答:“维特根斯坦。”“为什么?”“因为,在我的所有学生中,只有他一个人在听我的课时,老是有一大堆问题。”后来,维特根斯坦的名气超过了罗素。有一次有人问维特根斯坦:“罗素为什么落 Song Xi educator Zhu Xi said: ”There is no doubt that doubt must be taught suspicious doubtless, up to this party is motivated. “ In the history of Western philosophy there is such a famous story: at Cambridge University, Wittgenstein is a big philosophy Moore's student, one day, the great philosopher Russell asked Moore: ”Who is your best student?“ Moore replied without hesitation: ”Wittgenstein. “ ”Why? “Because, of all my students, there was always a whole lot of problems with him alone when he was listening to my class.” “Later, Wittgenstein outperformed Russell. Once Wittgenstein was asked: ”Why does Russell fall?