If the goal is to improve education, then one has to ask hard questions Like does a technology actually help?

假如目标是提高教育，那就要问问这样的问题,技术真的有帮助吗？

麻省理工公开课 - 媒体、教育、市场课程节选

For example, in the late 1990s, if you were to ask a question--I'm hypothesizing -how likely is it that the Dow will be over 10,000 by the year 2008?

例如,在90年代末,假如有人问你这样一个问题,道指在2008年底前,突破万点大关的可能性有多大

耶鲁公开课 - 金融市场课程节选